| 
                 
                    Closing price on 2/23/2010
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    22.90 | 
                 
                
                    | High | 
                    23.00 | 
                 
                
                    | Low | 
                    22.60 | 
                     
                
                    | Volume | 
                    266,940 | 
                                 
                
                    | Split-adjusted Price | 
                    5.42 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PET Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/23/2010
             | 
            
                -0.70 / -2.98%
             |             
            
                22.90
             |           
            
                23.00
             |               
            
                22.60
             |                           
            
                22.80
             | 
            
                22.80
             |                     
            
                5.42
             |                                 
            
                266,940
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2010
             | 
            
                +0.50 / +2.17%
             |             
            
                23.40
             |           
            
                23.80
             |               
            
                23.10
             |                           
            
                23.50
             | 
            
                23.50
             |                     
            
                5.58
             |                                 
            
                237,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/12/2010
             | 
            
                +0.60 / +2.68%
             |             
            
                22.80
             |           
            
                23.60
             |               
            
                22.80
             |                           
            
                23.00
             | 
            
                23.00
             |                     
            
                5.47
             |                                 
            
                248,910
             |            
            
                 
             |                                       
         
    
        
            | 
                2/11/2010
             | 
            
                0.00 / 0.00%
             |             
            
                22.40
             |           
            
                22.40
             |               
            
                22.40
             |                           
            
                22.40
             | 
            
                22.40
             |                     
            
                5.32
             |                                 
            
                261,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/10/2010
             | 
            
                +0.30 / +1.36%
             |             
            
                22.10
             |           
            
                22.50
             |               
            
                22.10
             |                           
            
                22.40
             | 
            
                22.40
             |                     
            
                5.32
             |                                 
            
                170,740
             |            
            
                 
             |                                       
         
    
        
            | 
                2/9/2010
             | 
            
                -1.00 / -4.33%
             |             
            
                22.70
             |           
            
                22.70
             |               
            
                22.10
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                5.25
             |                                 
            
                316,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2010
             | 
            
                0.00 / 0.00%
             |             
            
                23.00
             |           
            
                23.20
             |               
            
                22.40
             |                           
            
                23.10
             | 
            
                23.10
             |                     
            
                5.49
             |                                 
            
                313,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2010
             | 
            
                +0.80 / +3.59%
             |             
            
                22.40
             |           
            
                23.40
             |               
            
                22.40
             |                           
            
                23.10
             | 
            
                23.10
             |                     
            
                5.49
             |                                 
            
                1,569,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/4/2010
             | 
            
                +1.00 / +4.69%
             |             
            
                21.40
             |           
            
                22.30
             |               
            
                21.40
             |                           
            
                22.30
             | 
            
                22.30
             |                     
            
                5.30
             |                                 
            
                555,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/3/2010
             | 
            
                +0.50 / +2.40%
             |             
            
                20.80
             |           
            
                21.50
             |               
            
                20.80
             |                           
            
                21.30
             | 
            
                21.30
             |                     
            
                5.06
             |                                 
            
                499,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/2/2010
             | 
            
                -0.10 / -0.48%
             |             
            
                20.90
             |           
            
                21.10
             |               
            
                20.80
             |                           
            
                20.80
             | 
            
                20.80
             |                     
            
                4.94
             |                                 
            
                199,230
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2010
             | 
            
                +0.20 / +0.97%
             |             
            
                21.00
             |           
            
                21.20
             |               
            
                20.50
             |                           
            
                20.90
             | 
            
                20.90
             |                     
            
                4.97
             |                                 
            
                140,590
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2010
             | 
            
                +0.10 / +0.49%
             |             
            
                20.50
             |           
            
                21.00
             |               
            
                20.40
             |                           
            
                20.70
             | 
            
                20.70
             |                     
            
                4.92
             |                                 
            
                164,070
             |            
            
                 
             |                                       
         
    
        
            | 
                1/28/2010
             | 
            
                -0.40 / -1.90%
             |             
            
                20.60
             |           
            
                21.00
             |               
            
                20.50
             |                           
            
                20.60
             | 
            
                20.60
             |                     
            
                4.90
             |                                 
            
                177,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/27/2010
             | 
            
                -0.70 / -3.23%
             |             
            
                21.70
             |           
            
                22.00
             |               
            
                20.70
             |                           
            
                21.00
             | 
            
                21.00
             |                     
            
                4.99
             |                                 
            
                502,180
             |            
            
                 
             |                                       
         
    
        
            | 
                1/26/2010
             | 
            
                +1.00 / +4.83%
             |             
            
                21.50
             |           
            
                21.70
             |               
            
                21.00
             |                           
            
                21.70
             | 
            
                21.70
             |                     
            
                5.16
             |                                 
            
                279,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2010
             | 
            
                +0.50 / +2.48%
             |             
            
                20.50
             |           
            
                20.70
             |               
            
                20.00
             |                           
            
                20.70
             | 
            
                20.70
             |                     
            
                4.92
             |                                 
            
                175,210
             |            
            
                 
             |                                       
         
    
        
            | 
                1/22/2010
             | 
            
                +0.20 / +1.00%
             |             
            
                19.70
             |           
            
                20.70
             |               
            
                19.50
             |                           
            
                20.20
             | 
            
                20.20
             |                     
            
                4.80
             |                                 
            
                301,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/21/2010
             | 
            
                -1.00 / -4.76%
             |             
            
                20.60
             |           
            
                21.30
             |               
            
                20.00
             |                           
            
                20.00
             | 
            
                20.00
             |                     
            
                4.75
             |                                 
            
                446,870
             |            
            
                 
             |                                       
         
    
        
            | 
                1/20/2010
             | 
            
                -0.90 / -4.11%
             |             
            
                22.00
             |           
            
                22.20
             |               
            
                20.90
             |                           
            
                21.00
             | 
            
                21.00
             |                     
            
                4.99
             |                                 
            
                320,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2010
             | 
            
                0.00 / 0.00%
             |             
            
                21.90
             |           
            
                22.30
             |               
            
                21.50
             |                           
            
                21.90
             | 
            
                21.90
             |                     
            
                5.20
             |                                 
            
                397,160
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2010
             | 
            
                -1.10 / -4.78%
             |             
            
                22.60
             |           
            
                22.90
             |               
            
                21.90
             |                           
            
                21.90
             | 
            
                21.90
             |                     
            
                5.20
             |                                 
            
                613,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/15/2010
             | 
            
                -1.00 / -4.17%
             |             
            
                23.80
             |           
            
                23.90
             |               
            
                22.90
             |                           
            
                23.00
             | 
            
                23.00
             |                     
            
                5.47
             |                                 
            
                455,950
             |            
            
                 
             |                                       
         
    
        
            | 
                1/14/2010
             | 
            
                -0.30 / -1.23%
             |             
            
                24.60
             |           
            
                24.70
             |               
            
                24.00
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                5.70
             |                                 
            
                260,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/13/2010
             | 
            
                +0.80 / +3.40%
             |             
            
                23.50
             |           
            
                24.30
             |               
            
                22.50
             |                           
            
                24.30
             | 
            
                24.30
             |                     
            
                5.77
             |                                 
            
                390,420
             |            
            
                 
             |                                       
         
    
        
            | 
                1/12/2010
             | 
            
                -0.80 / -3.29%
             |             
            
                24.30
             |           
            
                25.00
             |               
            
                23.50
             |                           
            
                23.50
             | 
            
                23.50
             |                     
            
                5.58
             |                                 
            
                633,460
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/11/2010
             | 
            
                +1.10 / +4.74%
             |             
            
                23.80
             |           
            
                24.30
             |               
            
                23.70
             |                           
            
                24.30
             | 
            
                24.30
             |                     
            
                5.77
             |                                 
            
                1,152,550
             |            
            
                 
             |                                       
         
    
        
            | 
                1/8/2010
             | 
            
                -1.20 / -4.92%
             |             
            
                25.30
             |           
            
                25.30
             |               
            
                23.20
             |                           
            
                23.20
             | 
            
                23.20
             |                     
            
                5.51
             |                                 
            
                609,540
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/7/2010
             | 
            
                0.00 / 0.00%
             |             
            
                24.30
             |           
            
                24.80
             |               
            
                24.00
             |                           
            
                24.40
             | 
            
                24.40
             |                     
            
                5.80
             |                                 
            
                714,740
             |            
            
                 
             |                                       
         
    
        
            | 
                1/6/2010
             | 
            
                -0.40 / -1.61%
             |             
            
                24.30
             |           
            
                25.10
             |               
            
                24.20
             |                           
            
                24.40
             | 
            
                24.40
             |                     
            
                5.80
             |                                 
            
                443,740
             |  
            
                 
             |                                                              
             
    
         
    
    
 |