She started feeling bad & away from the herd 1 mo. ago. Found her on side in mud by hayring. She got up seemed to be bloated. Put her in corral she laid down more than getting up but eating good. Nuflored her. Let her out 1 wk later. Vet draxon & Banamine. No diagnosis. Walked across pasture. and downed for 2 days. Then walked about 100' & knocked over by another cow. Vet determined she's 7 mo bred. no diagnosis. Been down 1 1/2 wks. Been hip lifting & front strap 3 X day. Vet came & determined back leg swollen. Needed to put her down or abort calf. Didn't think it was milk fever?Don't know what else to do. She'll stand with the lift a minute or two.