We've got 2 cows here that are lame on the hind. Not sure if they are stifled or not (thinking that is the problem though). They were both so bad that they could hardly move. The one was bad in Oct and now you can hardly tell. The other hurt herself in Dec and while you can still tell, she moves around without too many problems now. They are due to calve about Mar 1 and both are really good cows. The one is only a 4 year old, and was lame last spring too so we will probably let her raise her calf and then cull her in the fall. The other is 8, and I think got hurt fighting with other cows. We will see how she comes around and then decide what to do with her. If they go downhill again, we do have a nurse cow that could step in when she calves.
They haven't been getting any special feed, just hay, and neither is in poor condition. They would be though if they were out with the main herd since they would always be shoved out of the way at the feed bunk.