| 
                 
                    Closing price on 5/16/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    13.90 | 
                 
                
                    | High | 
                    13.90 | 
                 
                
                    | Low | 
                    13.60 | 
                     
                
                    | Volume | 
                    167,120 | 
                                 
                
                    | Split-adjusted Price | 
                    3.43 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PET Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/16/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.90
             |           
            
                13.90
             |               
            
                13.60
             |                           
            
                13.80
             | 
            
                13.80
             |                     
            
                3.43
             |                                 
            
                167,120
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2011
             | 
            
                +0.20 / +1.47%
             |             
            
                13.80
             |           
            
                13.80
             |               
            
                13.60
             |                           
            
                13.80
             | 
            
                13.80
             |                     
            
                3.43
             |                                 
            
                156,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/12/2011
             | 
            
                -0.20 / -1.45%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                13.60
             |                           
            
                13.60
             | 
            
                13.60
             |                     
            
                3.38
             |                                 
            
                336,230
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2011
             | 
            
                -0.20 / -1.43%
             |             
            
                14.00
             |           
            
                14.10
             |               
            
                13.80
             |                           
            
                13.80
             | 
            
                13.80
             |                     
            
                3.43
             |                                 
            
                363,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/10/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.20
             |           
            
                14.20
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                3.48
             |                                 
            
                239,570
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2011
             | 
            
                +0.50 / +3.70%
             |             
            
                14.00
             |           
            
                14.10
             |               
            
                13.90
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                3.48
             |                                 
            
                331,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/6/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.40
             |           
            
                13.50
             |               
            
                13.30
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                3.35
             |                                 
            
                47,460
             |            
            
                 
             |                                       
         
    
        
            | 
                5/5/2011
             | 
            
                -0.20 / -1.46%
             |             
            
                13.80
             |           
            
                13.80
             |               
            
                13.40
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                3.35
             |                                 
            
                97,390
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.80
             |           
            
                13.80
             |               
            
                13.50
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                3.40
             |                                 
            
                251,040
             |            
            
                 
             |                                       
         
    
        
            | 
                4/29/2011
             | 
            
                +0.20 / +1.48%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                13.70
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                3.40
             |                                 
            
                217,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/28/2011
             | 
            
                +0.60 / +4.65%
             |             
            
                13.30
             |           
            
                13.50
             |               
            
                13.20
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                3.35
             |                                 
            
                1,100,940
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2011
             | 
            
                -0.10 / -0.77%
             |             
            
                13.10
             |           
            
                13.30
             |               
            
                12.90
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                3.20
             |                                 
            
                618,290
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2011
             | 
            
                -0.40 / -2.99%
             |             
            
                13.40
             |           
            
                13.40
             |               
            
                13.00
             |                           
            
                13.00
             | 
            
                13.00
             |                     
            
                3.23
             |                                 
            
                123,520
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2011
             | 
            
                +0.60 / +4.69%
             |             
            
                12.80
             |           
            
                13.40
             |               
            
                12.80
             |                           
            
                13.40
             | 
            
                13.40
             |                     
            
                3.33
             |                                 
            
                258,850
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2011
             | 
            
                -0.10 / -0.78%
             |             
            
                12.90
             |           
            
                13.00
             |               
            
                12.60
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                3.18
             |                                 
            
                274,520
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2011
             | 
            
                -0.30 / -2.27%
             |             
            
                13.20
             |           
            
                13.20
             |               
            
                12.80
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                3.20
             |                                 
            
                132,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2011
             | 
            
                -0.20 / -1.49%
             |             
            
                13.10
             |           
            
                13.40
             |               
            
                13.10
             |                           
            
                13.20
             | 
            
                13.20
             |                     
            
                3.28
             |                                 
            
                65,430
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.20
             |           
            
                13.50
             |               
            
                13.20
             |                           
            
                13.40
             | 
            
                13.40
             |                     
            
                3.33
             |                                 
            
                40,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2011
             | 
            
                -0.20 / -1.47%
             |             
            
                13.50
             |           
            
                13.60
             |               
            
                13.40
             |                           
            
                13.40
             | 
            
                13.40
             |                     
            
                3.33
             |                                 
            
                201,740
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2011
             | 
            
                -0.10 / -0.73%
             |             
            
                13.60
             |           
            
                13.70
             |               
            
                13.60
             |                           
            
                13.60
             | 
            
                13.60
             |                     
            
                3.38
             |                                 
            
                85,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2011
             | 
            
                -0.10 / -0.72%
             |             
            
                13.70
             |           
            
                13.80
             |               
            
                13.70
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                3.40
             |                                 
            
                82,030
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.70
             |           
            
                13.80
             |               
            
                13.70
             |                           
            
                13.80
             | 
            
                13.80
             |                     
            
                3.43
             |                                 
            
                105,760
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2011
             | 
            
                +0.20 / +1.47%
             |             
            
                13.60
             |           
            
                13.90
             |               
            
                13.50
             |                           
            
                13.80
             | 
            
                13.80
             |                     
            
                3.43
             |                                 
            
                129,420
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2011
             | 
            
                -0.30 / -2.16%
             |             
            
                13.90
             |           
            
                14.00
             |               
            
                13.60
             |                           
            
                13.60
             | 
            
                13.60
             |                     
            
                3.38
             |                                 
            
                176,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2011
             | 
            
                +0.10 / +0.72%
             |             
            
                13.80
             |           
            
                14.00
             |               
            
                13.80
             |                           
            
                13.90
             | 
            
                13.90
             |                     
            
                3.45
             |                                 
            
                263,290
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2011
             | 
            
                -0.20 / -1.43%
             |             
            
                13.80
             |           
            
                14.00
             |               
            
                13.80
             |                           
            
                13.80
             | 
            
                13.80
             |                     
            
                3.43
             |                                 
            
                106,880
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2011
             | 
            
                -0.10 / -0.71%
             |             
            
                14.10
             |           
            
                14.10
             |               
            
                13.90
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                3.48
             |                                 
            
                110,710
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2011
             | 
            
                -0.20 / -1.40%
             |             
            
                14.10
             |           
            
                14.10
             |               
            
                13.90
             |                           
            
                14.10
             | 
            
                14.10
             |                     
            
                3.50
             |                                 
            
                143,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2011
             | 
            
                -0.10 / -0.69%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                14.10
             |                           
            
                14.30
             | 
            
                14.30
             |                     
            
                3.55
             |                                 
            
                123,060
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2011
             | 
            
                -0.10 / -0.69%
             |             
            
                14.10
             |           
            
                14.40
             |               
            
                14.10
             |                           
            
                14.40
             | 
            
                14.40
             |                     
            
                3.58
             |                                 
            
                165,060
             |  
            
                 
             |                                                              
             
    
         
    
    
 |