not if they are well fed. he is only used to eating pellets so nothing else interest him much. They all pile on each other. I have (2) 6-7 inch endlis, (2) 6-7 inch sens, (2) 9-10 inch Laps, and then this big boy.
Makes me feel less dumb putting my new 2.5" del with my 10" del, but I've seen the new del get so close to the big girls mouth, and no interest. Really laid back del which I'm glad for.