I found some cheat for petville.Petville Coins Cheat.You wonder how to get coins easily you can use this cheat

Need:

• Cheat Engine 5.5
• Firefox / Flock
• Flash 9 or 10

Steps:

1. Open your Petville on facebook.
2. Open the cheat engine and choose browser for process list.
3. Scan ‘current coin’ , value type double.
4. Find the address with your exp without value.
5. Double click all the address without value and change the value to your desired amount.
6. Now just clean your pets to get an increase of coins to shopping.