I sent the photo of what I thought were intestines to turtle experts and I'm pleased to report it is, indeed, turtle poo. Whew.
I can't catch the giant catfish using liver wrapped in pantyhose on lines thrown into the pond here and there evidently as I've been trying for days. I'll pull them all out today and put Rocky, with his new paint job, back into the pond. Hope the hook passes or dissolves or whatever. He hasn't eaten anything at all.
I don't know what I'll do about the huge catfish and I don't know how I could have ever missed him in there. He really must be hiding well from me. I want him out of there.