2 nights ago I just recieved my 8 year old angus after visiting a bull from another pasture. I believe she must of stepped in a hole, she has a limp on her left front leg. I can not any hoof defomities, leg swelling, ect. She is eating & drinking well. I can NOT handle her, she is WILD. I am NEW in working with cattle & do not have a chute. I was wondering how many days should I observe her till I call a vet? If it is a sprain, how long will it take to heal on it's own & is there anything I can give her in her feed (safe for a pregnant cow)? Thanks for any suggestions!