What a sweet heifer😊
Unless she gets really pushy you are usually ok making a cow a pet.
Bull or even steer ,don't.
Quit feeding her treats from your hands/pockets if she is pushy.
Tie her short when u brush her so she won't try to rub on you.
Btw ,the Heather Smith Thomas books are usually available at TSC, I bought a couple myself when I got my first cow.