i have bright yellow lab who is kind of weird looking... the mouth is very small and it's really fat... especially right now i just notice... and all of a sudden it is being very aggressive towards any cichlids that go near it..... i was concerned maybe it could be bloat but he always had a tiny mouth and a big belly... is he just an over-eater? but i cant explain the sudden aggressive behavior.... in four months ive never seen him chase anyone now hes going after everyone