| 
                 
                    Closing price on 2/8/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    12.00 | 
                 
                
                    | High | 
                    12.40 | 
                 
                
                    | Low | 
                    12.00 | 
                     
                
                    | Volume | 
                    1,099,660 | 
                                 
                
                    | Split-adjusted Price | 
                    3.49 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PET Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/8/2012
             | 
            
                +0.50 / +4.20%
             |             
            
                12.00
             |           
            
                12.40
             |               
            
                12.00
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                3.49
             |                                 
            
                1,099,660
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2012
             | 
            
                0.00 / 0.00%
             |             
            
                11.90
             |           
            
                12.10
             |               
            
                11.80
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                3.35
             |                                 
            
                600,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2012
             | 
            
                0.00 / 0.00%
             |             
            
                11.90
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                3.35
             |                                 
            
                246,620
             |            
            
                 
             |                                       
         
    
        
            | 
                2/3/2012
             | 
            
                -0.50 / -4.03%
             |             
            
                12.50
             |           
            
                12.60
             |               
            
                11.90
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                3.35
             |                                 
            
                593,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/2/2012
             | 
            
                +0.40 / +3.33%
             |             
            
                12.20
             |           
            
                12.50
             |               
            
                12.10
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                3.49
             |                                 
            
                361,680
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2012
             | 
            
                0.00 / 0.00%
             |             
            
                12.00
             |           
            
                12.10
             |               
            
                11.80
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                3.38
             |                                 
            
                180,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2012
             | 
            
                +0.10 / +0.84%
             |             
            
                12.00
             |           
            
                12.30
             |               
            
                11.90
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                3.38
             |                                 
            
                425,200
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2012
             | 
            
                +0.10 / +0.85%
             |             
            
                11.80
             |           
            
                11.90
             |               
            
                11.60
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                3.35
             |                                 
            
                120,940
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/20/2012
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.90
             |               
            
                11.50
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                3.32
             |                                 
            
                349,620
             |            
            
                 
             |                                       
         
    
        
            | 
                1/19/2012
             | 
            
                +0.40 / +3.51%
             |             
            
                11.40
             |           
            
                11.80
             |               
            
                11.40
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                3.32
             |                                 
            
                206,190
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2012
             | 
            
                0.00 / 0.00%
             |             
            
                11.60
             |           
            
                11.60
             |               
            
                11.20
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                3.21
             |                                 
            
                115,790
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2012
             | 
            
                -0.10 / -0.87%
             |             
            
                11.40
             |           
            
                11.50
             |               
            
                11.40
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                3.21
             |                                 
            
                138,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/16/2012
             | 
            
                +0.10 / +0.88%
             |             
            
                11.40
             |           
            
                11.70
             |               
            
                11.40
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                3.24
             |                                 
            
                238,510
             |            
            
                 
             |                                       
         
    
        
            | 
                1/13/2012
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.40
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                3.21
             |                                 
            
                103,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/12/2012
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.70
             |               
            
                11.30
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                3.21
             |                                 
            
                145,140
             |            
            
                 
             |                                       
         
    
        
            | 
                1/11/2012
             | 
            
                -0.30 / -2.56%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.40
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                3.21
             |                                 
            
                86,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/10/2012
             | 
            
                +0.50 / +4.46%
             |             
            
                11.40
             |           
            
                11.70
             |               
            
                11.10
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                3.29
             |                                 
            
                276,950
             |            
            
                 
             |                                       
         
    
        
            | 
                1/9/2012
             | 
            
                0.00 / 0.00%
             |             
            
                11.20
             |           
            
                11.30
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                3.15
             |                                 
            
                173,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/6/2012
             | 
            
                -0.10 / -0.88%
             |             
            
                11.30
             |           
            
                11.30
             |               
            
                11.10
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                3.15
             |                                 
            
                29,010
             |            
            
                 
             |                                       
         
    
        
            | 
                1/5/2012
             | 
            
                -0.20 / -1.74%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.30
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                3.18
             |                                 
            
                56,230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/4/2012
             | 
            
                -0.20 / -1.71%
             |             
            
                11.60
             |           
            
                11.80
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                3.24
             |                                 
            
                79,470
             |            
            
                 
             |                                       
         
    
        
            | 
                1/3/2012
             | 
            
                -0.30 / -2.50%
             |             
            
                11.90
             |           
            
                12.00
             |               
            
                11.60
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                3.29
             |                                 
            
                132,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/30/2011
             | 
            
                +0.40 / +3.45%
             |             
            
                11.60
             |           
            
                12.00
             |               
            
                11.60
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                3.38
             |                                 
            
                412,240
             |            
            
                 
             |                                       
         
    
        
            | 
                12/29/2011
             | 
            
                +0.30 / +2.65%
             |             
            
                11.30
             |           
            
                11.60
             |               
            
                10.80
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                3.27
             |                                 
            
                308,920
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/28/2011
             | 
            
                +0.50 / +4.63%
             |             
            
                10.40
             |           
            
                11.30
             |               
            
                10.40
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                3.18
             |                                 
            
                170,820
             |            
            
                 
             |                                       
         
    
        
            | 
                12/27/2011
             | 
            
                +0.40 / +3.85%
             |             
            
                10.40
             |           
            
                10.80
             |               
            
                10.20
             |                           
            
                10.80
             | 
            
                10.80
             |                     
            
                3.04
             |                                 
            
                91,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/26/2011
             | 
            
                +0.10 / +0.97%
             |             
            
                10.30
             |           
            
                10.50
             |               
            
                10.20
             |                           
            
                10.40
             | 
            
                10.40
             |                     
            
                2.93
             |                                 
            
                50,990
             |            
            
                 
             |                                       
         
    
        
            | 
                12/23/2011
             | 
            
                -0.40 / -3.74%
             |             
            
                10.60
             |           
            
                10.60
             |               
            
                10.20
             |                           
            
                10.30
             | 
            
                10.30
             |                     
            
                2.90
             |                                 
            
                342,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/22/2011
             | 
            
                -0.50 / -4.46%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                10.70
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                3.01
             |                                 
            
                252,930
             |            
            
                 
             |                                       
         
    
        
            | 
                12/21/2011
             | 
            
                +0.10 / +0.90%
             |             
            
                11.10
             |           
            
                11.30
             |               
            
                11.10
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                3.15
             |                                 
            
                45,800
             |  
            
                 
             |                                                              
             
    
         
    
    
 |