you could try jugging for it, take a small carp or bluegill trim some of its fins down so blood goes into the water and hook behind the dorsal fin. attach to a line that you tie to a nut and drop into a large plastic bottle. when the catfish takes the bait it hooks itself trying to pull the jug under water. all you have to do is retreive your jug and attached catfish. since this is a carp pond i assume that there are no other aquatic predators so this should work for your cat no problem.