I have a dog training technical pond with various points on it. If I put catfish and BG in this pond will the catfish dig into my banks/points, islands and make holes or anything like that? We have put a lot of work into making these points and i dont want them to get destroyed.

I doubt it. Cats will take advantage of cavities but I'm not aware of them actually digging.

Especially not with channel cats.

Mine never have caused any problems on my banks. They do seem to keep the clay stirred up. If you want the cleanest water I wouldn't go for them. I'm taking mine out this year.