Currently all my Aracuanas are Rumpless. 2 have Ear Tufts... Ive collected eggs and now have about 6 or so babies a week old. 3 of them have rumps... one of the 3 has a great color. Its got red, grey, black and brown. Dont know if its a boy or girl, but im led to belive that all my Rumpless cary the Rump Gene? half have tails and half do not. Correct? So if my neat red grey black brown chick is a girl I plan on keeping her, but if its a male, will the tail be passed on to all the chicks. Is the Rump a Dom / Recessive gene? Thanks.