@badapple I looked and a male calico is 1 in 3000. Also I don't know what I was thinking our last calico was indeed a female. It was years ago so I forgot.
@Mossflower i guess so as i didnt know how rare they were, just knew it was really uncommon and knew they were sterile. another weird thing about animals if a cow has twins and one is a heifer the other is a bull, the heifer will be sterile.