well it could be possible if you happen have a white jacobin and a frill back of oppisite sex and they paired up. but I would not be so sure of the outcome, for one, it would not have frill or very little the jac would take that out. the neck feather may be a bit longer, but I would think it would look just like a indescript white pigeon, it may have grouse leg feathers though or may not. I would think that each breed cancels out what each one has. and it could be a color pigeon if you get a through back .can anyone tell me if its posable to breed a white frillback with a white jacobin? and if so what would be the result?