- I created several of my pets on the same day. As far as I know there's no limit, as long as you have pet slots available. Go wild. :P

I don't see anything in the rules or the Frequently Asked QUestions & Answers. FWIW from a practical point of view, I have done four in one day. It took me awhile to think of good names so if there's a time delay between creations less 20 minutes I wouldn't know about it.