| 
                 
                    Closing price on 3/30/2009
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    14.10 | 
                 
                
                    | High | 
                    14.50 | 
                 
                
                    | Low | 
                    14.00 | 
                     
                
                    | Volume | 
                    157,400 | 
                                 
                
                    | Split-adjusted Price | 
                    3.17 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PET Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/30/2009
             | 
            
                -0.30 / -2.08%
             |             
            
                14.10
             |           
            
                14.50
             |               
            
                14.00
             |                           
            
                14.10
             | 
            
                14.10
             |                     
            
                3.17
             |                                 
            
                157,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2009
             | 
            
                -0.60 / -4.00%
             |             
            
                15.30
             |           
            
                15.30
             |               
            
                14.40
             |                           
            
                14.40
             | 
            
                14.40
             |                     
            
                3.24
             |                                 
            
                421,190
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2009
             | 
            
                -0.20 / -1.32%
             |             
            
                15.00
             |           
            
                15.50
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                3.37
             |                                 
            
                323,250
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2009
             | 
            
                +0.70 / +4.83%
             |             
            
                14.10
             |           
            
                15.20
             |               
            
                14.10
             |                           
            
                15.20
             | 
            
                15.20
             |                     
            
                3.42
             |                                 
            
                532,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/24/2009
             | 
            
                +0.60 / +4.32%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                14.50
             |                           
            
                14.50
             | 
            
                14.50
             |                     
            
                3.26
             |                                 
            
                89,560
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2009
             | 
            
                +0.60 / +4.51%
             |             
            
                13.90
             |           
            
                13.90
             |               
            
                13.30
             |                           
            
                13.90
             | 
            
                13.90
             |                     
            
                3.12
             |                                 
            
                537,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2009
             | 
            
                +0.60 / +4.72%
             |             
            
                12.40
             |           
            
                13.30
             |               
            
                12.40
             |                           
            
                13.30
             | 
            
                13.30
             |                     
            
                2.99
             |                                 
            
                282,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2009
             | 
            
                -0.60 / -4.51%
             |             
            
                12.90
             |           
            
                13.50
             |               
            
                12.70
             |                           
            
                12.70
             | 
            
                12.70
             |                     
            
                2.85
             |                                 
            
                176,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2009
             | 
            
                +0.60 / +4.72%
             |             
            
                13.30
             |           
            
                13.30
             |               
            
                13.00
             |                           
            
                13.30
             | 
            
                13.30
             |                     
            
                2.99
             |                                 
            
                245,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/17/2009
             | 
            
                +0.60 / +4.96%
             |             
            
                12.30
             |           
            
                12.70
             |               
            
                12.30
             |                           
            
                12.70
             | 
            
                12.70
             |                     
            
                2.85
             |                                 
            
                165,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2009
             | 
            
                +0.20 / +1.68%
             |             
            
                11.90
             |           
            
                12.10
             |               
            
                11.90
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                2.72
             |                                 
            
                99,160
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2009
             | 
            
                -0.10 / -0.83%
             |             
            
                12.20
             |           
            
                12.30
             |               
            
                11.90
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                2.68
             |                                 
            
                95,870
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2009
             | 
            
                +0.20 / +1.69%
             |             
            
                11.70
             |           
            
                12.30
             |               
            
                11.30
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                2.70
             |                                 
            
                193,150
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2009
             | 
            
                +0.50 / +4.42%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                11.50
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                2.65
             |                                 
            
                100,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/10/2009
             | 
            
                +0.50 / +4.63%
             |             
            
                11.00
             |           
            
                11.30
             |               
            
                10.90
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                2.54
             |                                 
            
                140,790
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2009
             | 
            
                +0.20 / +1.89%
             |             
            
                10.60
             |           
            
                10.90
             |               
            
                10.60
             |                           
            
                10.80
             | 
            
                10.80
             |                     
            
                2.43
             |                                 
            
                43,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2009
             | 
            
                -0.40 / -3.64%
             |             
            
                10.70
             |           
            
                10.90
             |               
            
                10.60
             |                           
            
                10.60
             | 
            
                10.60
             |                     
            
                2.38
             |                                 
            
                38,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2009
             | 
            
                +0.20 / +1.85%
             |             
            
                10.90
             |           
            
                11.10
             |               
            
                10.90
             |                           
            
                11.00
             | 
            
                11.00
             |                     
            
                2.47
             |                                 
            
                55,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/4/2009
             | 
            
                +0.10 / +0.93%
             |             
            
                10.70
             |           
            
                10.90
             |               
            
                10.70
             |                           
            
                10.80
             | 
            
                10.80
             |                     
            
                2.43
             |                                 
            
                18,290
             |            
            
                 
             |                                       
         
    
        
            | 
                3/3/2009
             | 
            
                -0.30 / -2.73%
             |             
            
                10.50
             |           
            
                10.80
             |               
            
                10.50
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                2.41
             |                                 
            
                63,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2009
             | 
            
                0.00 / 0.00%
             |             
            
                10.70
             |           
            
                11.10
             |               
            
                10.70
             |                           
            
                11.00
             | 
            
                11.00
             |                     
            
                2.47
             |                                 
            
                33,830
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2009
             | 
            
                +0.30 / +2.80%
             |             
            
                10.50
             |           
            
                11.10
             |               
            
                10.50
             |                           
            
                11.00
             | 
            
                11.00
             |                     
            
                2.47
             |                                 
            
                51,850
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/26/2009
             | 
            
                +0.20 / +1.90%
             |             
            
                10.70
             |           
            
                10.80
             |               
            
                10.30
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                2.41
             |                                 
            
                162,990
             |            
            
                 
             |                                       
         
    
        
            | 
                2/25/2009
             | 
            
                +0.50 / +5.00%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.40
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                2.36
             |                                 
            
                82,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/24/2009
             | 
            
                -0.40 / -3.85%
             |             
            
                10.00
             |           
            
                10.10
             |               
            
                9.90
             |                           
            
                10.00
             | 
            
                10.00
             |                     
            
                2.25
             |                                 
            
                161,530
             |            
            
                 
             |                                       
         
    
        
            | 
                2/23/2009
             | 
            
                -0.50 / -4.59%
             |             
            
                10.90
             |           
            
                10.90
             |               
            
                10.40
             |                           
            
                10.40
             | 
            
                10.40
             |                     
            
                2.34
             |                                 
            
                81,140
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2009
             | 
            
                0.00 / 0.00%
             |             
            
                11.00
             |           
            
                11.00
             |               
            
                10.60
             |                           
            
                10.90
             | 
            
                10.90
             |                     
            
                2.45
             |                                 
            
                38,020
             |            
            
                 
             |                                       
         
    
        
            | 
                2/19/2009
             | 
            
                0.00 / 0.00%
             |             
            
                11.10
             |           
            
                11.30
             |               
            
                10.50
             |                           
            
                10.90
             | 
            
                10.90
             |                     
            
                2.45
             |                                 
            
                73,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/18/2009
             | 
            
                -0.50 / -4.39%
             |             
            
                10.90
             |           
            
                11.00
             |               
            
                10.90
             |                           
            
                10.90
             | 
            
                10.90
             |                     
            
                2.45
             |                                 
            
                175,960
             |            
            
                 
             |                                       
         
    
        
            | 
                2/17/2009
             | 
            
                -0.60 / -5.00%
             |             
            
                11.80
             |           
            
                11.90
             |               
            
                11.40
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                2.56
             |                                 
            
                128,670
             |  
            
                 
             |                                                              
             
    
         
    
    
 |