genetics do play a role, I can't deny that, but it's already been said that you must have a good temperament, and have PATIENCE!!, I find that if they're wildebeasts at 2 years old, they'll always be that way, if they're younger, they can learn to be pets...
Fleas are a blessing as a taming aide... I often try and snag a calf with a rope on a nice sunny day when they're all passed out enjoying the sun, and tie them up to something... then pet them, look them over for fleas, and start nit-picking... after a little bit of this, they usually start to think I'm a pretty good guy and worth keeping around... Treats like apples, carrots, grain, all help too, as well as a mother that doesn't get too alarmed that I have their calf tied up
I've seen calves go from wild (can't get within 50 feet) to being halterbroke and coming for a petting in as little as a week.. it takes a lot of work though.. if you can get ONE tame, it'll get the others curious.. which leads me to another thing...
different breeds have different curiosity levels, herefords, shorthorns, longhorns, and a bunch of others are really curious, which makes your life easier because they'll want to come up and figure out what you are when you go sit down in the field... the worst I've seen are the Salers... and well, if you live out in the sticks and they have to fend against wild animals, it's good, when you want to help them with a sore foot, it's not.
I like leaving a lead rope on the calves for a while, but evidently you can only do this in clear fields with no shrubs, etc to get hung up on... it is good however if cows step on it and it learns that it's no use pulling like a maniac
One last thing.. on calves up to about 5 months old.. pretend you're a calf, kneel in the field, they'll come around, they'll LOVE your boots (don't know why, just always happens), and they'll want to figure out where you are in the pecking order... You see what calves like doing... Headbutting.. I do it with them all the time, and neither you nor the calf will ever need or use all your/it's strength... I think they might think of you as one of them with this.. I don't know.. but will say it works.. then you can try and scratch the top of their head... always a soft spot, then the ears, and after they get used to that, they'll let you scratch their neck, and once you've got them to that, they'll be on halters before you know it
Maybe this is a little different that other people's methods, I'll just say it's mine and it works (see avatar picture)
