Wow! So would they be considered a giant Cochin? I have a friend who claims to have this breed, but I’ve never seen them although she did offer me giant Cochin fertile hatching eggs. Hhhmmm….
Before you make the decision to rehome, have you actually weighed him? Cochins have the appearance of being large, but it’s because of all their fluffy feathers - kinda like when you have a scraggly fluffy dog but when you shave it it’s super small. I don’t think he will hurt your hens at all...