anyone ever have a bgk atack again and again a spotted raphael catfish? my 10" bgk first pushes the spotted raph. then starts to go crazy on it...i think when the bgk pushes the cat it grunts witch drives the bgk over the edge...this cat is the only fish that my bgk has ever had a problem with...now on the other hand my other bgk doesn't notice the cat and if the bgk with the problem swims past the cat it also doesn't notice it...i think that the bgk is pushing the cat to investigate it and when it grunts the knife fells it is a threat...any thoughs or similar exp.?