if the sire had been a herford then mom would have died in labor. Normal yak calf is 20 to 30 pounds at birth.Are you sure he is not a Herford?![]()
You can cross breed BUT need to do a yak bull on "normal"cattle. And for best results add a just weaned yak bull to a cattle herd. Otherwise, the bull "prefers" a HAIRY partner (ie yak) to a regular cow.