| 
                 
                    Closing price on 8/12/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    11.80 | 
                 
                
                    | High | 
                    11.80 | 
                 
                
                    | Low | 
                    11.60 | 
                     
                
                    | Volume | 
                    15,920 | 
                                 
                
                    | Split-adjusted Price | 
                    3.29 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PET Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/12/2011
             | 
            
                +0.10 / +0.86%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                11.60
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                3.29
             |                                 
            
                15,920
             |            
            
                 
             |                                       
         
    
        
            | 
                8/11/2011
             | 
            
                +0.10 / +0.87%
             |             
            
                11.50
             |           
            
                11.60
             |               
            
                11.10
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                3.27
             |                                 
            
                44,990
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/10/2011
             | 
            
                +0.10 / +0.88%
             |             
            
                11.70
             |           
            
                11.80
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                3.24
             |                                 
            
                101,540
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2011
             | 
            
                -0.50 / -4.20%
             |             
            
                11.50
             |           
            
                11.60
             |               
            
                11.40
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                3.21
             |                                 
            
                150,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/8/2011
             | 
            
                -0.20 / -1.65%
             |             
            
                11.80
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                3.35
             |                                 
            
                52,280
             |            
            
                 
             |                                       
         
    
        
            | 
                8/5/2011
             | 
            
                -0.20 / -1.63%
             |             
            
                12.00
             |           
            
                12.30
             |               
            
                12.00
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                3.41
             |                                 
            
                47,460
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/4/2011
             | 
            
                +0.50 / +4.24%
             |             
            
                12.00
             |           
            
                12.30
             |               
            
                11.90
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                3.46
             |                                 
            
                156,700
             |            
            
                 
             |                                       
         
    
        
            | 
                8/3/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.70
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                3.32
             |                                 
            
                81,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/2/2011
             | 
            
                -0.30 / -2.48%
             |             
            
                12.10
             |           
            
                12.10
             |               
            
                11.80
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                3.32
             |                                 
            
                91,810
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2011
             | 
            
                -0.30 / -2.42%
             |             
            
                12.40
             |           
            
                12.40
             |               
            
                12.10
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                3.41
             |                                 
            
                25,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/29/2011
             | 
            
                +0.20 / +1.64%
             |             
            
                12.60
             |           
            
                12.60
             |               
            
                12.20
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                3.49
             |                                 
            
                109,150
             |            
            
                 
             |                                       
         
    
        
            | 
                7/28/2011
             | 
            
                +0.50 / +4.27%
             |             
            
                12.00
             |           
            
                12.20
             |               
            
                12.00
             |                           
            
                12.20
             | 
            
                12.20
             |                     
            
                3.43
             |                                 
            
                191,240
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/27/2011
             | 
            
                -0.10 / -0.85%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                11.60
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                3.29
             |                                 
            
                92,980
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2011
             | 
            
                +0.10 / +0.85%
             |             
            
                11.60
             |           
            
                12.00
             |               
            
                11.60
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                3.32
             |                                 
            
                37,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/25/2011
             | 
            
                -0.10 / -0.85%
             |             
            
                11.60
             |           
            
                11.90
             |               
            
                11.60
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                3.29
             |                                 
            
                18,320
             |            
            
                 
             |                                       
         
    
        
            | 
                7/22/2011
             | 
            
                -0.10 / -0.84%
             |             
            
                11.90
             |           
            
                11.90
             |               
            
                11.80
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                3.32
             |                                 
            
                11,770
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/21/2011
             | 
            
                -0.10 / -0.83%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                11.80
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                3.35
             |                                 
            
                76,070
             |            
            
                 
             |                                       
         
    
        
            | 
                7/20/2011
             | 
            
                +0.30 / +2.56%
             |             
            
                11.60
             |           
            
                12.00
             |               
            
                11.60
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                3.38
             |                                 
            
                92,880
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/19/2011
             | 
            
                -0.30 / -2.50%
             |             
            
                12.10
             |           
            
                12.10
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                3.29
             |                                 
            
                90,160
             |            
            
                 
             |                                       
         
    
        
            | 
                7/18/2011
             | 
            
                -0.10 / -0.83%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                11.80
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                3.38
             |                                 
            
                24,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.20
             |           
            
                12.30
             |               
            
                12.10
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                3.41
             |                                 
            
                88,460
             |            
            
                 
             |                                       
         
    
        
            | 
                7/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.30
             |           
            
                12.30
             |               
            
                12.00
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                3.41
             |                                 
            
                53,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2011
             | 
            
                -0.30 / -2.42%
             |             
            
                12.40
             |           
            
                12.50
             |               
            
                12.10
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                3.41
             |                                 
            
                143,910
             |            
            
                 
             |                                       
         
    
        
            | 
                7/12/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.20
             |           
            
                12.40
             |               
            
                12.10
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                3.49
             |                                 
            
                117,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.30
             |           
            
                12.70
             |               
            
                12.20
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                3.49
             |                                 
            
                123,730
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2011
             | 
            
                -0.30 / -2.36%
             |             
            
                12.40
             |           
            
                12.60
             |               
            
                12.40
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                3.49
             |                                 
            
                114,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/7/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.50
             |           
            
                12.80
             |               
            
                12.50
             |                           
            
                12.70
             | 
            
                12.70
             |                     
            
                3.57
             |                                 
            
                998,650
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2011
             | 
            
                -0.20 / -1.55%
             |             
            
                12.70
             |           
            
                12.90
             |               
            
                12.70
             |                           
            
                12.70
             | 
            
                12.70
             |                     
            
                3.57
             |                                 
            
                172,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/5/2011
             | 
            
                +0.20 / +1.57%
             |             
            
                13.00
             |           
            
                13.20
             |               
            
                12.60
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                3.63
             |                                 
            
                733,950
             |            
            
                 
             |                                       
         
    
        
            | 
                7/4/2011
             | 
            
                -0.60 / -4.51%
             |             
            
                12.90
             |           
            
                13.00
             |               
            
                12.70
             |                           
            
                12.70
             | 
            
                12.70
             |                     
            
                3.57
             |                                 
            
                584,220
             |  
            
                 
             |                                                              
             
    
         
    
    
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