| 
                 
                    Closing price on 8/21/2009
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    31.70 | 
                 
                
                    | High | 
                    31.70 | 
                 
                
                    | Low | 
                    28.70 | 
                     
                
                    | Volume | 
                    1,526,630 | 
                                 
                
                    | Split-adjusted Price | 
                    7.13 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PET Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/21/2009
             | 
            
                -0.20 / -0.66%
             |             
            
                31.70
             |           
            
                31.70
             |               
            
                28.70
             |                           
            
                30.00
             | 
            
                30.00
             |                     
            
                7.13
             |                                 
            
                1,526,630
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2009
             | 
            
                +1.40 / +4.86%
             |             
            
                30.20
             |           
            
                30.20
             |               
            
                29.60
             |                           
            
                30.20
             | 
            
                30.20
             |                     
            
                7.18
             |                                 
            
                2,817,140
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/19/2009
             | 
            
                +1.30 / +4.73%
             |             
            
                28.80
             |           
            
                28.80
             |               
            
                28.80
             |                           
            
                28.80
             | 
            
                28.80
             |                     
            
                6.84
             |                                 
            
                292,130
             |            
            
                 
             |                                       
         
    
        
            | 
                8/18/2009
             | 
            
                +1.30 / +4.96%
             |             
            
                26.70
             |           
            
                27.50
             |               
            
                26.30
             |                           
            
                27.50
             | 
            
                27.50
             |                     
            
                6.54
             |                                 
            
                1,499,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2009
             | 
            
                +0.40 / +1.55%
             |             
            
                25.60
             |           
            
                26.50
             |               
            
                25.60
             |                           
            
                26.20
             | 
            
                26.20
             |                     
            
                6.23
             |                                 
            
                805,550
             |            
            
                 
             |                                       
         
    
        
            | 
                8/14/2009
             | 
            
                -0.90 / -3.37%
             |             
            
                26.50
             |           
            
                26.80
             |               
            
                25.70
             |                           
            
                25.80
             | 
            
                25.80
             |                     
            
                6.13
             |                                 
            
                870,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/13/2009
             | 
            
                +1.20 / +4.71%
             |             
            
                26.70
             |           
            
                26.70
             |               
            
                26.50
             |                           
            
                26.70
             | 
            
                26.70
             |                     
            
                6.35
             |                                 
            
                1,275,590
             |            
            
                 
             |                                       
         
    
        
            | 
                8/12/2009
             | 
            
                +1.20 / +4.94%
             |             
            
                25.00
             |           
            
                25.50
             |               
            
                24.80
             |                           
            
                25.50
             | 
            
                25.50
             |                     
            
                6.06
             |                                 
            
                1,240,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/11/2009
             | 
            
                0.00 / 0.00%
             |             
            
                24.30
             |           
            
                24.40
             |               
            
                24.00
             |                           
            
                24.30
             | 
            
                24.30
             |                     
            
                5.77
             |                                 
            
                362,810
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2009
             | 
            
                +0.80 / +3.40%
             |             
            
                23.90
             |           
            
                24.60
             |               
            
                23.60
             |                           
            
                24.30
             | 
            
                24.30
             |                     
            
                5.77
             |                                 
            
                689,940
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/7/2009
             | 
            
                +0.20 / +0.86%
             |             
            
                23.30
             |           
            
                23.90
             |               
            
                23.20
             |                           
            
                23.50
             | 
            
                23.50
             |                     
            
                5.58
             |                                 
            
                355,000
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2009
             | 
            
                -0.20 / -0.85%
             |             
            
                23.40
             |           
            
                23.90
             |               
            
                23.30
             |                           
            
                23.30
             | 
            
                23.30
             |                     
            
                5.54
             |                                 
            
                539,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/5/2009
             | 
            
                -0.40 / -1.67%
             |             
            
                23.70
             |           
            
                23.80
             |               
            
                23.30
             |                           
            
                23.50
             | 
            
                23.50
             |                     
            
                5.58
             |                                 
            
                409,180
             |            
            
                 
             |                                       
         
    
        
            | 
                8/4/2009
             | 
            
                +0.70 / +3.02%
             |             
            
                23.80
             |           
            
                23.90
             |               
            
                23.30
             |                           
            
                23.90
             | 
            
                23.90
             |                     
            
                5.68
             |                                 
            
                465,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2009
             | 
            
                +0.30 / +1.31%
             |             
            
                23.00
             |           
            
                23.90
             |               
            
                22.60
             |                           
            
                23.20
             | 
            
                23.20
             |                     
            
                5.51
             |                                 
            
                702,280
             |            
            
                 
             |                                       
         
    
        
            | 
                7/31/2009
             | 
            
                +1.00 / +4.57%
             |             
            
                22.00
             |           
            
                22.90
             |               
            
                22.00
             |                           
            
                22.90
             | 
            
                22.90
             |                     
            
                5.44
             |                                 
            
                635,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/30/2009
             | 
            
                0.00 / 0.00%
             |             
            
                21.30
             |           
            
                21.90
             |               
            
                20.90
             |                           
            
                21.90
             | 
            
                21.90
             |                     
            
                5.20
             |                                 
            
                490,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/29/2009
             | 
            
                -0.10 / -0.45%
             |             
            
                22.90
             |           
            
                22.90
             |               
            
                21.60
             |                           
            
                21.90
             | 
            
                21.90
             |                     
            
                5.20
             |                                 
            
                428,430
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/28/2009
             | 
            
                +0.40 / +1.85%
             |             
            
                21.70
             |           
            
                22.60
             |               
            
                21.20
             |                           
            
                22.00
             | 
            
                22.00
             |                     
            
                5.23
             |                                 
            
                1,155,960
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2009
             | 
            
                +1.00 / +4.85%
             |             
            
                21.60
             |           
            
                21.60
             |               
            
                21.00
             |                           
            
                21.60
             | 
            
                21.60
             |                     
            
                5.13
             |                                 
            
                666,660
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/24/2009
             | 
            
                +0.90 / +4.57%
             |             
            
                20.60
             |           
            
                20.60
             |               
            
                20.60
             |                           
            
                20.60
             | 
            
                20.60
             |                     
            
                4.90
             |                                 
            
                181,110
             |            
            
                 
             |                                       
         
    
        
            | 
                7/23/2009
             | 
            
                +0.90 / +4.79%
             |             
            
                18.80
             |           
            
                19.70
             |               
            
                18.80
             |                           
            
                19.70
             | 
            
                19.70
             |                     
            
                4.68
             |                                 
            
                212,240
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/22/2009
             | 
            
                +0.10 / +0.53%
             |             
            
                19.20
             |           
            
                19.20
             |               
            
                18.80
             |                           
            
                18.80
             | 
            
                18.80
             |                     
            
                4.47
             |                                 
            
                124,060
             |            
            
                 
             |                                       
         
    
        
            | 
                7/21/2009
             | 
            
                +0.20 / +1.08%
             |             
            
                18.50
             |           
            
                19.30
             |               
            
                18.50
             |                           
            
                18.70
             | 
            
                18.70
             |                     
            
                4.44
             |                                 
            
                142,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/20/2009
             | 
            
                -0.70 / -3.65%
             |             
            
                18.50
             |           
            
                18.60
             |               
            
                18.30
             |                           
            
                18.50
             | 
            
                18.50
             |                     
            
                4.40
             |                                 
            
                191,310
             |            
            
                 
             |                                       
         
    
        
            | 
                7/17/2009
             | 
            
                -0.40 / -2.04%
             |             
            
                19.20
             |           
            
                19.40
             |               
            
                19.00
             |                           
            
                19.20
             | 
            
                19.20
             |                     
            
                4.56
             |                                 
            
                102,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/16/2009
             | 
            
                +0.60 / +3.16%
             |             
            
                19.90
             |           
            
                19.90
             |               
            
                19.00
             |                           
            
                19.60
             | 
            
                19.60
             |                     
            
                4.66
             |                                 
            
                180,080
             |            
            
                 
             |                                       
         
    
        
            | 
                7/15/2009
             | 
            
                +0.70 / +3.83%
             |             
            
                18.60
             |           
            
                19.20
             |               
            
                18.60
             |                           
            
                19.00
             | 
            
                19.00
             |                     
            
                4.52
             |                                 
            
                188,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/14/2009
             | 
            
                -0.70 / -3.68%
             |             
            
                18.80
             |           
            
                19.20
             |               
            
                18.10
             |                           
            
                18.30
             | 
            
                18.30
             |                     
            
                4.35
             |                                 
            
                293,850
             |            
            
                 
             |                                       
         
    
        
            | 
                7/13/2009
             | 
            
                -0.90 / -4.52%
             |             
            
                19.60
             |           
            
                19.80
             |               
            
                19.00
             |                           
            
                19.00
             | 
            
                19.00
             |                     
            
                4.52
             |                                 
            
                177,420
             |  
            
                 
             |                                                              
             
    
         
    
    
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