my son wants to purchase some long horns for a hobby. my question is: on the average at what age do they reach sexual maturity. he wants to run them with my cows until he can get his place fenced. they are 6 months old now and it will be a few months before he is ready to move them. i am in the middle of breeding my cows now. i breed naturally and do not want his long horn bull to go to any of my commercial cows. also he would prefer not to have my brangus bull go to his heifers. any help would be appreciated.