This is a fact. And contrary to what they claim, at some point they start killing more than they can eat. Instead of just killing one once in awhile when they are hungry, they will kill several and only consume one. When they start to do this it becomes a serious problem for any stock owner. Lynx and Bobcats will do the same.
Coyotes are even worse . . . which is why they should be shot on sight and bounty paid for each mangy hide turned in . . .