Help with a doe please

Yes we have one with the same systems. She started limping real bad on her left rear leg. I thought she had injured the leg. I knocked her down checked her out and found nothing. Shortly after she couldn't hardly stand up on either back leg. She was losing weight rapidly. We knocked her down again and when she was down I thought maybe she had slipped a disc from giving birth. I pulled her back legs straight back in line with her spine and gave her a quick jerk. Her back popped big time. We started feeding her some probiotics to help with the weight lose. After that she seemed to be doing better. Then it moved to her right rear leg even though it was not as bad. It has to be some kind of nerve problem. She has been medicated to the max. This has been over a six week period. She has put some weight back on but she is still not normal. I'm clueless as to what this could be. Hopefully someone will have some insight. Here is a pic of her at her worst.

White muscle disease? Might be a selenium deficiency, just a guess?

I would have the vet run a stool sample For Starters

I had a doe that had the same symptons you have been talking about. She acted the same.She was 10 year old the last four years she only acted that way when she had fawns. She was bottle fed I came home Monday she tried to come up the hill and fell over I ran down and with in 4 min she was dead. Maybe we all can learn what do do if a deer acts like this!