It's alright, we've never done cattle since I've been alive so my knowledge on them are very limited. If they have a hairy belly-button hanging from the stomach...well, it's not a belly-button and it's a boy lol. You'll know when and if it's big boy, if the farmer doesn't keep him separated.
FWIW, if you ever do "need" to shoot one don't waste your time with the head.
(Unless you shoot deer with a .458 Lott!?!?)
He'll have his head down and you want to send the bullet through the top of his neck. Let his spine become a grenade and leave the bullet to do whatever it can in the boiler room.
P.S. Do an image search (google) for Beefalo. You might, I do at least, find it very cool that they crossbred buffalo to cattle. (3/8 to 5/8 actually) There meat is supposed to basically be
bison...which is as lean as venison. (Yep, looked it up)
THEN...do an image search for "Belgium Blue" and thank you're lucky stars THAT think wasn't staring you down!!