Abstract: A calf feeder device adapted to float in a pail or the like of cow's milk, liquid feed, milk supplement or milk replacer. The calf feeder floats partially submerged in the milk with the nipple projecting generally upwardly and continuously filled with milk. Accordingly, a calf confronting such pail of feed may select between sucking the nipple or drinking the milk alongside the nipple and above the partially submerged floating calf feeder. Through the use of the floating calf feeder, a calf may be fed liquid feed supplement a short time after birth and after ingesting sufficient colostrum which is contained in its mother's milk through the natural process of sucking its mother's nipple or teat.