I observed a half eaten three to four pound bass on a black plastic float i have in my pond. Over a week or so the bass gradually disappeared. Today I discovered a half eaten grass carp, four or five pounds, half eaten on the bank. i have researched this site and understand how big a problem this can be. I think I also have a "small" muskrat problem and have talked to a trapper friend about trapping them. He says that occasionally he accidentally catches an otter in one of his traps. What a pity.