That's a roo for sure. The grabbing the neck thing, that's him asserting his dominance and trying to mount the ladies. The comb looks like what I've seen on Easter Egg roos. It may have been something pea-combed with yellow legs over a BO. The only thing that comes to mind, pea-combed and yellow skinned, are Buckeyes. I'm sure there are others. I guess an EE could fit that description too.