Ive never fed hairless because they were too expensive. I always thoughtthe hair helped with cleaning them out like fiber does us. Also I always thought the hairless were ugly and hard to keep warm. I know the 1 ps we had close to where I live had them for almost $40 a piece. They also had problems with them getting sick because of catching a chill. I've owned hooded rats that were sweethearts. They were pets not food.