The Net worths that we have are really good dispostioned. From what I've heard you don't want to use him on anything that has attitude. If the cow is docile the calf will follow suit. If the cows is waspy....you'd better fortify your barn! BTW, we've got four net worths that I'd let my 5year old nephew lead. The other one we have was never halter broke but she works fine and didn't try to eat me when she calved.