Jighead , Theo and Bill :

I have seen no info on flathead cats and don't know much about cats in ponds in general. I will pass along this bit of info for what its worth. A friend of mine is a fisheries professor and related a story. His Univ. had among others a 5 acre pond they used for BG research . They had 100% BG in the pond and his students would catch them for various projects and research. This was a controled site with no public access .So they thought. When the students over several years kept reporting that it was getting harder to catch BG samples the prof was puzzled . They drained the pond and found very few BG . They did find a number of flatheads with a 3 or 4 over 40 lbs. They assume that a local was using their BG pond as a grow out pond for flatheads.
I don't know how many were put in and taken out so no guess if they could control the pond under normal conditions.Thanks-- ewest