I turned out a 18 month old bull that I just bought. I haven't camped out down there watching him but I think something is wrong. He will sniff and mosey around cows but he acts uninterested and I have never seen him jump up on a female in heat. I wonder if it hurts him to mount? I remember 40 years ago dad had a bull that had a sore on his weiner and he bred no cows. He's the only bull in with 20 head. I guess I am thinking about turning in another bull. Maybe I could dna test calves later. Any past experiences?