I am sorry to hear about the DM diagnosis.I had a friend that had a German Sheppard with DM.She tried treatment with acupuncture and Chinese herbs.I don't know if it slowed the degeneration down, but it made her feel better to try something.He had the disease for 4+ years. After 2 years he was completely down in the rearend,but they did not give up. She bought him a wheel chair. He did great in it, he could run and play with the other dogs again.It never seemed to bother him that he could not use his rear legs.He did though have bowel control issues, especially while sleeping.He was very happy in his final 2 years with his wheel chair. He had to be PTS for other issues at 14 years old. My friend is still so thankful she got the wheelchair for him and they had 2 more years together.I wish you good luck for Muddy and hope you find some treatment that will make it easier on both of you.katslady