| 
                 
                    Closing price on 12/2/2010
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    16.50 | 
                 
                
                    | High | 
                    17.20 | 
                 
                
                    | Low | 
                    16.00 | 
                     
                
                    | Volume | 
                    595,810 | 
                                 
                
                    | Split-adjusted Price | 
                    4.22 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PET Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                12/2/2010
             | 
            
                +0.50 / +3.03%
             |             
            
                16.50
             |           
            
                17.20
             |               
            
                16.00
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                4.22
             |                                 
            
                595,810
             |            
            
                 
             |                                       
         
    
        
            | 
                12/1/2010
             | 
            
                -0.50 / -2.94%
             |             
            
                16.70
             |           
            
                17.30
             |               
            
                16.30
             |                           
            
                16.50
             | 
            
                16.50
             |                     
            
                4.10
             |                                 
            
                232,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/30/2010
             | 
            
                +0.80 / +4.94%
             |             
            
                16.50
             |           
            
                17.00
             |               
            
                16.50
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                4.22
             |                                 
            
                688,230
             |            
            
                 
             |                                       
         
    
        
            | 
                11/29/2010
             | 
            
                +0.70 / +4.52%
             |             
            
                15.30
             |           
            
                16.20
             |               
            
                15.30
             |                           
            
                16.20
             | 
            
                16.20
             |                     
            
                4.02
             |                                 
            
                170,790
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/26/2010
             | 
            
                -0.10 / -0.64%
             |             
            
                15.70
             |           
            
                15.80
             |               
            
                15.40
             |                           
            
                15.50
             | 
            
                15.50
             |                     
            
                3.85
             |                                 
            
                205,180
             |            
            
                 
             |                                       
         
    
        
            | 
                11/25/2010
             | 
            
                +0.30 / +1.96%
             |             
            
                15.50
             |           
            
                15.90
             |               
            
                15.40
             |                           
            
                15.60
             | 
            
                15.60
             |                     
            
                3.87
             |                                 
            
                264,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/24/2010
             | 
            
                0.00 / 0.00%
             |             
            
                14.90
             |           
            
                15.50
             |               
            
                14.90
             |                           
            
                15.30
             | 
            
                15.30
             |                     
            
                3.80
             |                                 
            
                84,470
             |            
            
                 
             |                                       
         
    
        
            | 
                11/23/2010
             | 
            
                +0.20 / +1.32%
             |             
            
                15.30
             |           
            
                15.30
             |               
            
                14.90
             |                           
            
                15.30
             | 
            
                15.30
             |                     
            
                3.80
             |                                 
            
                163,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/22/2010
             | 
            
                0.00 / 0.00%
             |             
            
                14.70
             |           
            
                15.10
             |               
            
                14.70
             |                           
            
                15.10
             | 
            
                15.10
             |                     
            
                3.75
             |                                 
            
                131,550
             |            
            
                 
             |                                       
         
    
        
            | 
                11/19/2010
             | 
            
                -0.30 / -1.95%
             |             
            
                15.30
             |           
            
                15.50
             |               
            
                15.10
             |                           
            
                15.10
             | 
            
                15.10
             |                     
            
                3.75
             |                                 
            
                106,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/18/2010
             | 
            
                +0.70 / +4.76%
             |             
            
                14.70
             |           
            
                15.40
             |               
            
                14.70
             |                           
            
                15.40
             | 
            
                15.40
             |                     
            
                3.82
             |                                 
            
                257,430
             |            
            
                 
             |                                       
         
    
        
            | 
                11/17/2010
             | 
            
                +0.10 / +0.68%
             |             
            
                14.80
             |           
            
                15.10
             |               
            
                14.70
             |                           
            
                14.70
             | 
            
                14.70
             |                     
            
                3.65
             |                                 
            
                188,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/16/2010
             | 
            
                -0.50 / -3.31%
             |             
            
                15.10
             |           
            
                15.10
             |               
            
                14.50
             |                           
            
                14.60
             | 
            
                14.60
             |                     
            
                3.63
             |                                 
            
                310,140
             |            
            
                 
             |                                       
         
    
        
            | 
                11/15/2010
             | 
            
                -0.60 / -3.82%
             |             
            
                15.60
             |           
            
                15.70
             |               
            
                15.10
             |                           
            
                15.10
             | 
            
                15.10
             |                     
            
                3.75
             |                                 
            
                105,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/12/2010
             | 
            
                -0.60 / -3.68%
             |             
            
                16.00
             |           
            
                16.20
             |               
            
                15.50
             |                           
            
                15.70
             | 
            
                15.70
             |                     
            
                3.90
             |                                 
            
                554,280
             |            
            
                 
             |                                       
         
    
        
            | 
                11/11/2010
             | 
            
                -0.30 / -1.81%
             |             
            
                16.80
             |           
            
                16.80
             |               
            
                16.30
             |                           
            
                16.30
             | 
            
                16.30
             |                     
            
                4.05
             |                                 
            
                170,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/10/2010
             | 
            
                0.00 / 0.00%
             |             
            
                16.60
             |           
            
                16.80
             |               
            
                16.40
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                4.12
             |                                 
            
                226,200
             |            
            
                 
             |                                       
         
    
        
            | 
                11/9/2010
             | 
            
                -0.40 / -2.35%
             |             
            
                17.00
             |           
            
                17.00
             |               
            
                16.60
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                4.12
             |                                 
            
                232,260
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/8/2010
             | 
            
                -0.50 / -2.86%
             |             
            
                17.50
             |           
            
                17.50
             |               
            
                17.00
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                4.22
             |                                 
            
                162,390
             |            
            
                 
             |                                       
         
    
        
            | 
                11/5/2010
             | 
            
                +0.70 / +4.17%
             |             
            
                17.40
             |           
            
                17.50
             |               
            
                17.00
             |                           
            
                17.50
             | 
            
                17.50
             |                     
            
                4.35
             |                                 
            
                381,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/4/2010
             | 
            
                0.00 / 0.00%
             |             
            
                16.80
             |           
            
                16.90
             |               
            
                16.70
             |                           
            
                16.80
             | 
            
                16.80
             |                     
            
                4.17
             |                                 
            
                282,790
             |            
            
                 
             |                                       
         
    
        
            | 
                11/3/2010
             | 
            
                -0.20 / -1.18%
             |             
            
                16.80
             |           
            
                17.00
             |               
            
                16.70
             |                           
            
                16.80
             | 
            
                16.80
             |                     
            
                4.17
             |                                 
            
                215,050
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/2/2010
             | 
            
                -0.20 / -1.16%
             |             
            
                17.20
             |           
            
                17.20
             |               
            
                16.80
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                4.22
             |                                 
            
                436,670
             |            
            
                 
             |                                       
         
    
        
            | 
                11/1/2010
             | 
            
                -0.20 / -1.15%
             |             
            
                17.40
             |           
            
                17.50
             |               
            
                17.20
             |                           
            
                17.20
             | 
            
                17.20
             |                     
            
                4.27
             |                                 
            
                198,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/29/2010
             | 
            
                +0.40 / +2.35%
             |             
            
                17.20
             |           
            
                17.50
             |               
            
                17.10
             |                           
            
                17.40
             | 
            
                17.40
             |                     
            
                4.32
             |                                 
            
                294,460
             |            
            
                 
             |                                       
         
    
        
            | 
                10/28/2010
             | 
            
                0.00 / 0.00%
             |             
            
                17.00
             |           
            
                17.20
             |               
            
                16.80
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                4.22
             |                                 
            
                162,460
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/27/2010
             | 
            
                -0.40 / -2.30%
             |             
            
                17.40
             |           
            
                17.50
             |               
            
                17.00
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                4.22
             |                                 
            
                63,670
             |            
            
                 
             |                                       
         
    
        
            | 
                10/26/2010
             | 
            
                +0.50 / +2.96%
             |             
            
                17.50
             |           
            
                17.70
             |               
            
                17.10
             |                           
            
                17.40
             | 
            
                17.40
             |                     
            
                4.32
             |                                 
            
                200,510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/25/2010
             | 
            
                +0.20 / +1.20%
             |             
            
                16.80
             |           
            
                17.00
             |               
            
                16.50
             |                           
            
                16.90
             | 
            
                16.90
             |                     
            
                4.20
             |                                 
            
                201,140
             |            
            
                 
             |                                       
         
    
        
            | 
                10/22/2010
             | 
            
                0.00 / 0.00%
             |             
            
                17.10
             |           
            
                17.10
             |               
            
                16.60
             |                           
            
                16.70
             | 
            
                16.70
             |                     
            
                4.15
             |                                 
            
                86,130
             |  
            
                 
             |                                                              
             
    
         
    
    
 |