| 
                 
                    Closing price on 6/15/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    12.00 | 
                 
                
                    | High | 
                    12.10 | 
                 
                
                    | Low | 
                    11.60 | 
                     
                
                    | Volume | 
                    311,030 | 
                                 
                
                    | Split-adjusted Price | 
                    3.35 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PET Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/15/2011
             | 
            
                -0.30 / -2.46%
             |             
            
                12.00
             |           
            
                12.10
             |               
            
                11.60
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                3.35
             |                                 
            
                311,030
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2011
             | 
            
                +0.20 / +1.67%
             |             
            
                12.00
             |           
            
                12.60
             |               
            
                11.90
             |                           
            
                12.20
             | 
            
                12.20
             |                     
            
                3.43
             |                                 
            
                427,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2011
             | 
            
                0.00 / 0.00%
             |             
            
                11.80
             |           
            
                12.30
             |               
            
                11.70
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                3.38
             |                                 
            
                228,850
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2011
             | 
            
                +0.50 / +4.35%
             |             
            
                11.80
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                3.38
             |                                 
            
                517,180
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2011
             | 
            
                +0.10 / +0.88%
             |             
            
                11.20
             |           
            
                11.60
             |               
            
                11.20
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                3.24
             |                                 
            
                139,140
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2011
             | 
            
                -0.20 / -1.72%
             |             
            
                11.60
             |           
            
                11.70
             |               
            
                11.20
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                3.21
             |                                 
            
                355,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2011
             | 
            
                +0.50 / +4.50%
             |             
            
                11.30
             |           
            
                11.60
             |               
            
                11.20
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                3.27
             |                                 
            
                357,570
             |            
            
                 
             |                                       
         
    
        
            | 
                6/6/2011
             | 
            
                +0.20 / +1.83%
             |             
            
                11.00
             |           
            
                11.10
             |               
            
                10.80
             |                           
            
                11.10
             | 
            
                11.10
             |                     
            
                3.12
             |                                 
            
                75,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/3/2011
             | 
            
                -0.30 / -2.68%
             |             
            
                11.50
             |           
            
                11.60
             |               
            
                10.90
             |                           
            
                10.90
             | 
            
                10.90
             |                     
            
                3.07
             |                                 
            
                417,430
             |            
            
                 
             |                                       
         
    
        
            | 
                6/2/2011
             | 
            
                +0.40 / +3.70%
             |             
            
                11.20
             |           
            
                11.30
             |               
            
                11.00
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                3.15
             |                                 
            
                675,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/1/2011
             | 
            
                +0.50 / +4.85%
             |             
            
                10.30
             |           
            
                10.80
             |               
            
                10.30
             |                           
            
                10.80
             | 
            
                10.80
             |                     
            
                3.04
             |                                 
            
                187,160
             |            
            
                 
             |                                       
         
    
        
            | 
                5/31/2011
             | 
            
                -0.20 / -1.90%
             |             
            
                10.10
             |           
            
                10.50
             |               
            
                10.10
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                2.90
             |                                 
            
                57,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/30/2011
             | 
            
                -0.50 / -4.55%
             |             
            
                10.60
             |           
            
                10.80
             |               
            
                10.50
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                2.96
             |                                 
            
                241,610
             |            
            
                 
             |                                       
         
    
        
            | 
                5/27/2011
             | 
            
                +0.50 / +4.76%
             |             
            
                10.90
             |           
            
                11.00
             |               
            
                10.60
             |                           
            
                11.00
             | 
            
                11.00
             |                     
            
                3.10
             |                                 
            
                157,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/26/2011
             | 
            
                +0.50 / +5.00%
             |             
            
                9.50
             |           
            
                10.50
             |               
            
                9.50
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                2.96
             |                                 
            
                293,870
             |            
            
                 
             |                                       
         
    
        
            | 
                5/25/2011
             | 
            
                -0.50 / -4.76%
             |             
            
                10.20
             |           
            
                10.20
             |               
            
                10.00
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                2.81
             |                                 
            
                314,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/24/2011
             | 
            
                -0.50 / -4.55%
             |             
            
                10.70
             |           
            
                10.80
             |               
            
                10.50
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                2.96
             |                                 
            
                355,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/23/2011
             | 
            
                -0.40 / -3.51%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                10.90
             |                           
            
                11.00
             | 
            
                11.00
             |                     
            
                3.10
             |                                 
            
                265,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/20/2011
             | 
            
                -0.20 / -1.72%
             |             
            
                11.60
             |           
            
                11.70
             |               
            
                11.40
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                3.21
             |                                 
            
                238,990
             |            
            
                 
             |                                       
         
    
        
            | 
                5/19/2011
             | 
            
                -0.10 / -0.85%
             |             
            
                11.70
             |           
            
                11.80
             |               
            
                11.60
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                3.27
             |                                 
            
                112,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2011
             | 
            
                -1.90 / -13.97%
             |             
            
                11.70
             |           
            
                11.90
             |               
            
                11.50
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                3.29
             |                                 
            
                474,550
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2011
             | 
            
                -0.20 / -1.45%
             |             
            
                13.80
             |           
            
                13.80
             |               
            
                13.60
             |                           
            
                13.60
             | 
            
                13.60
             |                     
            
                3.38
             |                                 
            
                255,390
             |  
            
                 
             |                                                              
             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
         
    
    
 |