Never heard of doing that before. Than again there's probably lots I ain't heard of.Other threads and hear awhile ago post mention putting in a bird with the new ones to see if they make it sick as they can be carriers. They came from GFF as chicks to a lady an hour from here who because of order numbers had too many so they were in her grow out pen before coming to me. Since U just had to replace my entire clock I am paranoid.