I have a senior pygmy doe who is around 11 years old, Maggie is plump, healthy and even, by some miracle, produced a nice little doeling this spring. However, one of her front knees stays swollen and she limps constantly. I keep her hooves trimmed and she has never had hoof rot. She also up to date on all of her shots. Could she have arthritis? If you are in the field, you can hear her knee creak (just like mine!). It also seems to affect her more in the cooler, damp weather. She still gets around very well and rather quickly. Any suggestions to help her out a little?