Daisy's right rear paw is the worst of her paws. It folds underneath her and she is not aware of it. Her other paws show some signs of the same problem. This has been coming on for the last few months. Our vet says that it is the nerves in her lower spine that are causing the problem.
No trauma or illness.
Our other Berner, Emily had this same problem; she eventually lost her mobility completely. She passed at age 10 about 2 years ago.
No. Different parents.
Unfortunately, DM is a degenerative issue for which there really, truly is no treatment. I do know many people who use Meloxicam (also known as Metacam) that seems to help a bit with discomfort becuase of it's pain control and anti-inflammatory properties, but sadly...it's simply masking the problem.
I think if your dog seems uncomfortable more times than not, then using the Metacam may help improve his quality of life for a while.
There's more information on DM here: http://www.petplace.com/dogs/degenerative-myelopathy/page1.aspx
And here's a site that deals specifically with DM in Berners:http://berner.org/pages/neurological_disorders/degenerative_myelopathy.php
If Daisy were mine, I'd start by talking to the vet and seeing if he feels this could be what is going on.
I hope this helps.