We had a cow that was down from milk fever for 2 weeks and she's now pregnant and has only a slight limp to show for being down. For those two weeks we turned her twice a day, rubbed her legs with essential oils and exercised them every couple of hours. We also built a lift similar to what you can find online called Upsi-Daisy and stood her up for short amounts of time at first and then lengthened the time and also how much weight we let her put on her own legs. It was probably over a month until she was totally back up and walking on her own, and even after that we had to be careful with her and take care of some "bed-sores" that she had from being down so long. It was a long process, but she was a champ and God worked a miracle!