How do you define hold?
I think of holding as holding them at a certain weight for a show, but breeding heifers show by age so I'm not sure why you would want to hold her weight. If she's getting too framy, too fat, or if she's bred and gonna calve in a few months then there are different things you can do.
How old is the heifer, is she bred, and what are you trying to hold?
New to showing need help with show stick