Extractor - When treating a pet that has swallowed something, you can extract the item from the belly to get a free item. The next day when the owner comes to pick up the pet you get will get money and an item.

Get more money without treating animals! - All at one time, hold down R, L, A, B, X, and Y. Hold down for about 5 minutes and you will have up to 1,000,000 dollars!

Hilary Duff - If you treat Hilary Duff's pet well you will get more people to come over to you to treat their pets.

Moving out - When buying a new house, your house will be in your inventory. If you want to move just "Use" it. You will be asked if you want to move out. Tap "Yes".

Free item - When treating a pet that has swallowed something, you can extract the item from the belly to get a free item. The next day when the owner comes to pick up the pet you get will get money and an item.

Cheap food - In the beginning you can only cook eggs. Just stick with it -- making harder food costs more items and is just as effective.

Pet in inventory - Open the cage that your pet is in, tap him, then select "Put in inventory".

Treating more pets - If you treat Hilary Duff's pet well you will get more people to come over to you to treat their pets.

Sicknesses

Broken leg
Length: 5 days
Cure: Put bandage on and let him or her rest a lot

Flea
Length: 3 days
Cure: Wash him or her with an anti-flea shampoo

Flu
Length: 3 days
Cure: Flu medicine for three days every day one time

Item swallowed
Length: Unknown; as long as it takes for you to extract it
Cure: Buy an Extractor and extract the item from the pet's belly

Ugly
Length: Unknown; as long as it takes for you to make the pet beautiful
Cure: Comb his or her hair and put some clothes on

Worms
Length: 3 days.
Cure: Feed him or her anti-worm food