How do you delete a pet on wizard101

Go to one of the pet shops-- either in the Shopping District or in Pet Pavilion-- and click the SELL tab on top (it should be on BUY by default). Click on the PETS tab (the pig with wings) and click on the pet you want to delete. It will show you a picture of the pet, how much gold/crowns you'll get from selling it, etc. Click SELL. Done!