Hi Susan. I new to frogs but I think they will be okay. When I went to the pet store to get Shrek II I purposely picked a bigger frog because my Fiona grew a lot in the 2 weeks I had her. When I got him home though he was much smaller than her. They get along fine, he's a snuggler and likes to touch her when they sleep. The other night Fiona was sitting on top of him and he was fine and kicked her off when he was tired of her. I'll try to post a picture.