Well, I was thinking that it would be cool to do a mixture of both, but Ferrepets is focused on breeding right? Since the whole point of breeding is to get new interesting designs, I think you should try to do what looks best with designs. Also, as long as your larger pets aren't super huge (like over 150 in height), I don't think it would be an issue. Maybe just a few pixels smaller than the ferret in your signature?
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