My first animal in my zoo were aardvarks, I've had the same exhibit going since the beginning. Normally keeping one and replacing the other when they die or if I wasn't happy with the genetics. Currently I have a pretty good aardvark and its mate died so I got a new one from the market. Now they won't breed, the reason? It says one already has a mate so it won't breed with the new animal. But no mate is listed for either of them. I think I'll store them both in the trade center, they have good genetics that I don't want to loose.