I have a five yr. old Jack Russell. He has had surgery on one of his rear legs years ago due to defect in his knee joint. Over the years the best thing other than drugs for the vet to stop the pain and o comfort him was Heat. We moved from Cold Ohio to Naples, Fl. for a few years and he was like a pup again. Laying in the sun and that really helped him a lot. Now due to work we have had to move back to Ohio and the winter is really starting to take it tole on him. Instead of keeping him on meds from the vet we place a heating pad in his bed during the day and really helps him. Believe me, three or four hour of that and he is good to go. Other home made cures other than a good diet just are not going to made much difference. You got a just try the heating pad. It's cheap and it works.
The Ears Tips Gauge Internal Body Temperature
I noticed as my dog has aged (he's now 14) that he gets cold quite easily. That said, I never bath him in the winter months because he has a hard time warming up afterwards and shivers for hours. This winter I realized that a good way to guage his body temperature was by feeling the tips of his ears. When he's internally cold, his ear tips are cold. He will start to shiver if I don't warm them (the ears) up. I can also warm him considerably simply by massaging along his spine, up and down. I also give him a good scratch over his entire body since that too warms him up. His ears get nice and toasty by the time I am finished and he has a satisfied glow!