Kodiak, our 10 y.o. Great Pyrenees rescue-dog, is going downhill fast & I don't know how to help him. His hips started going about 9 months ago, starting with shakes & trembling & now he can't stay standing long enough to eat & his hips give out while he's going to the bathroom. He's always been golden about house training but started having accidents about 6 months ago & has gotten so bad that we had to put him in the back yard 2 weeks ago...he didn't give any sign he needed to go out & left messes going down our hallway multiple times per day for a couple weeks, even with the doggy door. He's still eating, though not as well as before, & he has MUCH less energy. We took him with us on a 20 mile hike 18 months ago...today he has a hard time walking to the end of the block. The hard part is he still seems so happy to be with us & frolics like a pup when we go for his walks...he's falling apart at the seams & doesn't seem to know. When we banished him to the back yard he cried pitifully for 3 days & he still bawls every time he sees us through the sliding glass door. Now that it's Fall, I can leave him outside (though i hate it), but if he's still alive next summer he won't survive the heat out there (think Death Valley...124°F last summer). Suggestions? Help!?