| 
                 
                    Closing price on 5/14/2009
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    17.60 | 
                 
                
                    | High | 
                    18.00 | 
                 
                
                    | Low | 
                    17.60 | 
                     
                
                    | Volume | 
                    276,100 | 
                                 
                
                    | Split-adjusted Price | 
                    4.28 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PET Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/14/2009
             | 
            
                +0.40 / +2.27%
             |             
            
                17.60
             |           
            
                18.00
             |               
            
                17.60
             |                           
            
                18.00
             | 
            
                18.00
             |                     
            
                4.28
             |                                 
            
                276,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2009
             | 
            
                -0.60 / -3.30%
             |             
            
                18.20
             |           
            
                19.00
             |               
            
                17.60
             |                           
            
                17.60
             | 
            
                17.60
             |                     
            
                4.18
             |                                 
            
                417,420
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/12/2009
             | 
            
                +0.80 / +4.60%
             |             
            
                17.00
             |           
            
                18.20
             |               
            
                17.00
             |                           
            
                18.20
             | 
            
                18.20
             |                     
            
                4.33
             |                                 
            
                506,410
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2009
             | 
            
                +0.40 / +2.35%
             |             
            
                17.50
             |           
            
                17.50
             |               
            
                17.00
             |                           
            
                17.40
             | 
            
                17.40
             |                     
            
                4.14
             |                                 
            
                372,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/8/2009
             | 
            
                0.00 / 0.00%
             |             
            
                17.00
             |           
            
                17.60
             |               
            
                17.00
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                4.04
             |                                 
            
                266,340
             |            
            
                 
             |                                       
         
    
        
            | 
                5/7/2009
             | 
            
                -0.10 / -0.58%
             |             
            
                17.50
             |           
            
                17.50
             |               
            
                17.00
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                4.04
             |                                 
            
                326,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/6/2009
             | 
            
                -1.40 / -7.57%
             |             
            
                17.00
             |           
            
                17.50
             |               
            
                16.70
             |                           
            
                17.10
             | 
            
                17.14
             |                     
            
                4.06
             |                                 
            
                192,070
             |            
            
                 
             |                                       
         
    
        
            | 
                5/5/2009
             | 
            
                +0.80 / +4.52%
             |             
            
                18.50
             |           
            
                18.50
             |               
            
                18.50
             |                           
            
                18.50
             | 
            
                18.50
             |                     
            
                4.16
             |                                 
            
                343,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2009
             | 
            
                +0.80 / +4.73%
             |             
            
                17.70
             |           
            
                17.70
             |               
            
                17.70
             |                           
            
                17.70
             | 
            
                17.70
             |                     
            
                3.98
             |                                 
            
                86,140
             |            
            
                 
             |                                       
         
    
        
            | 
                4/29/2009
             | 
            
                +0.30 / +1.81%
             |             
            
                16.60
             |           
            
                16.90
             |               
            
                16.30
             |                           
            
                16.90
             | 
            
                16.90
             |                     
            
                3.80
             |                                 
            
                160,360
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/28/2009
             | 
            
                +0.70 / +4.40%
             |             
            
                16.60
             |           
            
                16.60
             |               
            
                15.90
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                3.73
             |                                 
            
                283,740
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2009
             | 
            
                +0.70 / +4.61%
             |             
            
                15.90
             |           
            
                15.90
             |               
            
                15.90
             |                           
            
                15.90
             | 
            
                15.90
             |                     
            
                3.57
             |                                 
            
                18,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2009
             | 
            
                -0.80 / -5.00%
             |             
            
                15.50
             |           
            
                15.90
             |               
            
                15.20
             |                           
            
                15.20
             | 
            
                15.20
             |                     
            
                3.42
             |                                 
            
                250,840
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2009
             | 
            
                -0.50 / -3.03%
             |             
            
                16.50
             |           
            
                16.80
             |               
            
                16.00
             |                           
            
                16.00
             | 
            
                16.00
             |                     
            
                3.60
             |                                 
            
                170,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2009
             | 
            
                +0.50 / +3.13%
             |             
            
                16.70
             |           
            
                16.70
             |               
            
                15.80
             |                           
            
                16.50
             | 
            
                16.50
             |                     
            
                3.71
             |                                 
            
                263,590
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2009
             | 
            
                -0.80 / -4.76%
             |             
            
                16.00
             |           
            
                16.00
             |               
            
                16.00
             |                           
            
                16.00
             | 
            
                16.00
             |                     
            
                3.60
             |                                 
            
                59,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2009
             | 
            
                -0.80 / -4.55%
             |             
            
                16.80
             |           
            
                16.80
             |               
            
                16.80
             |                           
            
                16.80
             | 
            
                16.80
             |                     
            
                3.78
             |                                 
            
                19,870
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2009
             | 
            
                -0.90 / -4.86%
             |             
            
                17.80
             |           
            
                18.00
             |               
            
                17.60
             |                           
            
                17.60
             | 
            
                17.60
             |                     
            
                3.96
             |                                 
            
                276,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2009
             | 
            
                +0.20 / +1.09%
             |             
            
                18.80
             |           
            
                18.80
             |               
            
                18.20
             |                           
            
                18.50
             | 
            
                18.50
             |                     
            
                4.16
             |                                 
            
                355,950
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2009
             | 
            
                -0.70 / -3.68%
             |             
            
                18.40
             |           
            
                19.50
             |               
            
                18.10
             |                           
            
                18.30
             | 
            
                18.30
             |                     
            
                4.11
             |                                 
            
                376,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2009
             | 
            
                +0.90 / +4.97%
             |             
            
                18.50
             |           
            
                19.00
             |               
            
                18.00
             |                           
            
                19.00
             | 
            
                19.00
             |                     
            
                4.27
             |                                 
            
                500,020
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2009
             | 
            
                +0.80 / +4.62%
             |             
            
                18.10
             |           
            
                18.10
             |               
            
                18.10
             |                           
            
                18.10
             | 
            
                18.10
             |                     
            
                4.07
             |                                 
            
                79,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2009
             | 
            
                +0.80 / +4.85%
             |             
            
                17.30
             |           
            
                17.30
             |               
            
                17.20
             |                           
            
                17.30
             | 
            
                17.30
             |                     
            
                3.89
             |                                 
            
                243,820
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2009
             | 
            
                -0.10 / -0.60%
             |             
            
                16.80
             |           
            
                17.00
             |               
            
                16.50
             |                           
            
                16.50
             | 
            
                16.50
             |                     
            
                3.71
             |                                 
            
                261,880
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2009
             | 
            
                -0.40 / -2.35%
             |             
            
                16.70
             |           
            
                17.80
             |               
            
                16.40
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                3.73
             |                                 
            
                361,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2009
             | 
            
                +0.80 / +4.94%
             |             
            
                16.40
             |           
            
                17.00
             |               
            
                16.20
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                3.82
             |                                 
            
                424,280
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2009
             | 
            
                +0.70 / +4.52%
             |             
            
                16.20
             |           
            
                16.20
             |               
            
                16.00
             |                           
            
                16.20
             | 
            
                16.20
             |                     
            
                3.64
             |                                 
            
                308,080
             |            
            
                 
             |                                       
         
    
        
            | 
                4/2/2009
             | 
            
                +0.40 / +2.65%
             |             
            
                15.50
             |           
            
                15.50
             |               
            
                15.10
             |                           
            
                15.50
             | 
            
                15.50
             |                     
            
                3.48
             |                                 
            
                324,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/1/2009
             | 
            
                +0.60 / +4.14%
             |             
            
                15.00
             |           
            
                15.20
             |               
            
                14.90
             |                           
            
                15.10
             | 
            
                15.10
             |                     
            
                3.39
             |                                 
            
                211,810
             |            
            
                 
             |                                       
         
    
        
            | 
                3/31/2009
             | 
            
                +0.40 / +2.84%
             |             
            
                14.10
             |           
            
                14.50
             |               
            
                14.10
             |                           
            
                14.50
             | 
            
                14.50
             |                     
            
                3.26
             |                                 
            
                169,150
             |  
            
                 
             |                                                              
             
    
         
    
    
 |