how do I add my pet to pet wars

Your pet will automatically be entered (randomly) as long as you have a photo posted of him/her. They will only use the main photo you have chosen for your pet, no matter how many different ones you upload....so pick the cutest photo you can!

The photos go up in some sort of rotation, I suspect random. Two of mine have been up multiple times, but the others have not been up yet.

You just upload a picture of your pet in your zoo and then your pet will automatically start showing up in Pet Wars. It may take a little time.