Tools you need :
1) Charles (download it here)
2) Firefox
Steps:
1) : Open Charles
2) : Start Pet Resort Game
3) : In charles, you will see the line http://petresort-fb-web-active-vip.playdom.com
4) : Expand it and you will see ‘amfphp’
5): Right click amfphp and select Breakpoints
6): Refresh Pet Resort
7): A breakpoint tab will appear. Click Execute 7 times.
8): Click on the Edit Response tab
9): Click AMF tab.
10): Change Player_XP and Player_Coins to 90127200
11): Click Execute 12 times.
12): Edit Response tab > AMF
13): Change Player_Cash to 90127200
14): Click Execute 2 times.
Edit Response tab > AMF
Change Player_Cash to 90127200
You should see everything reflected in the game! Isn’t it?
Just save it and refresh. Everything still remains.
source:here