Weird wolf glitch

I was playing with huge pack of wolves and then I accidentally hit a wolf with a sword I tried feeding it the raw beef then its tail went down like a newborn wolf puppy (I call them wolves but their tamed) and I could not feed it again or breed it. It happened again when I had a pup born when I tried feeding him he would not eat, some wolves are just fine but not others (maybe their sterile) it really ticked me off so please fix!!!