I have three sows and a boar. Two sows run 500lbs one about 250lbs. One 500lb sow came into heat and the boar tried to get her. He's only 200lbs. He missed and she came back into heat today. However my other two don't seem to have a strong heat, and even when the other 500lb sow came into heat the boar didn't even show interest. Any ideas?