Tyler Ludens wrote:If the chicken is not to suffer a painful death from infection the remaining stub needs to be amputated and the skin sutured shut. If this can't be done it should be put down, in my opinion.
Only problem with that is chickens are usually not valued
enough, for very rational reasons, to be worth the vet bill for that. If the OP has the skills to do that it might be worth trying, but otherwise, barring the owner being wealthy enough to be ok with the vet bill, it most likely should be put down.