| 
                 
                    Closing price on 3/22/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    13.50 | 
                 
                
                    | High | 
                    14.00 | 
                 
                
                    | Low | 
                    13.50 | 
                     
                
                    | Volume | 
                    461,280 | 
                                 
                
                    | Split-adjusted Price | 
                    3.86 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PET Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/22/2012
             | 
            
                0.00 / 0.00%
             |             
            
                13.50
             |           
            
                14.00
             |               
            
                13.50
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                3.86
             |                                 
            
                461,280
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2012
             | 
            
                0.00 / 0.00%
             |             
            
                13.80
             |           
            
                14.10
             |               
            
                13.70
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                3.86
             |                                 
            
                1,008,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2012
             | 
            
                +0.20 / +1.48%
             |             
            
                13.50
             |           
            
                13.70
             |               
            
                13.50
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                3.86
             |                                 
            
                180,220
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2012
             | 
            
                +0.20 / +1.50%
             |             
            
                13.30
             |           
            
                13.80
             |               
            
                13.30
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                3.80
             |                                 
            
                311,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2012
             | 
            
                -0.40 / -2.92%
             |             
            
                13.80
             |           
            
                14.00
             |               
            
                13.30
             |                           
            
                13.30
             | 
            
                13.30
             |                     
            
                3.74
             |                                 
            
                839,960
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2012
             | 
            
                +0.60 / +4.58%
             |             
            
                13.10
             |           
            
                13.70
             |               
            
                12.80
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                3.86
             |                                 
            
                889,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2012
             | 
            
                0.00 / 0.00%
             |             
            
                13.10
             |           
            
                13.30
             |               
            
                12.80
             |                           
            
                13.10
             | 
            
                13.10
             |                     
            
                3.69
             |                                 
            
                202,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2012
             | 
            
                +0.30 / +2.34%
             |             
            
                12.80
             |           
            
                13.40
             |               
            
                12.80
             |                           
            
                13.10
             | 
            
                13.10
             |                     
            
                3.69
             |                                 
            
                267,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2012
             | 
            
                -0.50 / -3.76%
             |             
            
                13.20
             |           
            
                13.40
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                3.60
             |                                 
            
                466,220
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2012
             | 
            
                +0.20 / +1.53%
             |             
            
                13.00
             |           
            
                13.40
             |               
            
                12.80
             |                           
            
                13.30
             | 
            
                13.30
             |                     
            
                3.74
             |                                 
            
                441,280
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2012
             | 
            
                -0.60 / -4.38%
             |             
            
                13.40
             |           
            
                13.70
             |               
            
                13.10
             |                           
            
                13.10
             | 
            
                13.10
             |                     
            
                3.69
             |                                 
            
                602,570
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2012
             | 
            
                +0.10 / +0.74%
             |             
            
                13.60
             |           
            
                13.70
             |               
            
                13.10
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                3.86
             |                                 
            
                585,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2012
             | 
            
                -0.50 / -3.55%
             |             
            
                14.60
             |           
            
                14.60
             |               
            
                13.50
             |                           
            
                13.60
             | 
            
                13.60
             |                     
            
                3.83
             |                                 
            
                841,850
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2012
             | 
            
                +0.60 / +4.44%
             |             
            
                14.10
             |           
            
                14.10
             |               
            
                14.00
             |                           
            
                14.10
             | 
            
                14.10
             |                     
            
                3.97
             |                                 
            
                535,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2012
             | 
            
                +0.10 / +0.75%
             |             
            
                13.40
             |           
            
                13.80
             |               
            
                13.40
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                3.80
             |                                 
            
                983,290
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2012
             | 
            
                -0.10 / -0.74%
             |             
            
                13.60
             |           
            
                13.70
             |               
            
                13.30
             |                           
            
                13.40
             | 
            
                13.40
             |                     
            
                3.77
             |                                 
            
                455,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/29/2012
             | 
            
                +0.10 / +0.75%
             |             
            
                13.40
             |           
            
                13.60
             |               
            
                13.00
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                3.80
             |                                 
            
                769,360
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2012
             | 
            
                -0.70 / -4.96%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                13.40
             |                           
            
                13.40
             | 
            
                13.40
             |                     
            
                3.77
             |                                 
            
                440,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2012
             | 
            
                +0.40 / +2.92%
             |             
            
                13.80
             |           
            
                14.10
             |               
            
                13.60
             |                           
            
                14.10
             | 
            
                14.10
             |                     
            
                3.97
             |                                 
            
                551,840
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2012
             | 
            
                +0.50 / +3.79%
             |             
            
                13.50
             |           
            
                13.80
             |               
            
                13.40
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                3.86
             |                                 
            
                1,709,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/23/2012
             | 
            
                +0.60 / +4.76%
             |             
            
                12.70
             |           
            
                13.20
             |               
            
                12.50
             |                           
            
                13.20
             | 
            
                13.20
             |                     
            
                3.72
             |                                 
            
                1,232,940
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2012
             | 
            
                +0.30 / +2.44%
             |             
            
                12.20
             |           
            
                12.60
             |               
            
                12.20
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                3.55
             |                                 
            
                404,690
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2012
             | 
            
                -0.30 / -2.38%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.20
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                3.46
             |                                 
            
                437,120
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2012
             | 
            
                +0.40 / +3.28%
             |             
            
                12.40
             |           
            
                12.70
             |               
            
                12.30
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                3.55
             |                                 
            
                571,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/17/2012
             | 
            
                +0.40 / +3.39%
             |             
            
                11.90
             |           
            
                12.20
             |               
            
                11.90
             |                           
            
                12.20
             | 
            
                12.20
             |                     
            
                3.43
             |                                 
            
                198,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/16/2012
             | 
            
                -0.10 / -0.84%
             |             
            
                11.90
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                3.32
             |                                 
            
                315,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/15/2012
             | 
            
                -0.10 / -0.83%
             |             
            
                11.90
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                3.35
             |                                 
            
                238,720
             |            
            
                 
             |                                       
         
    
        
            | 
                2/14/2012
             | 
            
                +0.20 / +1.69%
             |             
            
                11.70
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                3.38
             |                                 
            
                284,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/13/2012
             | 
            
                -0.20 / -1.67%
             |             
            
                11.90
             |           
            
                11.90
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                3.32
             |                                 
            
                178,140
             |            
            
                 
             |                                       
         
    
        
            | 
                2/10/2012
             | 
            
                -0.30 / -2.44%
             |             
            
                12.20
             |           
            
                12.40
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                3.38
             |                                 
            
                514,310
             |  
            
                 
             |                                                              
             
    
         
    
    
 |