I have young reg. Char. bull that I will breeding with herefore cross cows that are good mommas. I would like to keep a few young hefier's. Will they have any problem with the Char. bull at cavling ? He was 76 lbs at b/w his sire 80 and dam 78. Most of my mommas young calves or 65 to 70 lbs. Also what would be a good breed to replace with to breed with Char. I can get reg. Red Angus from a good friend ?