I have 2 - 7 month old holstein calves. The heifer won't stand up. She appears to want to and will attempt but doesn't seem to have the strength in her legs. I've tried helping her but I can't get her up. The other calf seems fine, he's moving around eating, drinking etc. I think she was chewing her cud when I first opened the barn door. I offered her some warm water with ketamalt in it and she seemed interested and even took a little but it looked like she wasn't comfortable drinking laying down. I don't know what to do!