Thanks for helping me get some perspective on this guys. The Rimadyl won't actually fix the underlying problem either. But I think the crossroads we are at is if I can't get her to eat better, she will waste away anyhow. I found a canned food she decently likes and have been giving her "duck jerky" which has a higher fat content than chicken jerky. I wish she'd eat more of her dried food. I know she's old and only has so long to live anyway, maybe another good year or so. I do want her to be comfortable, if that is the trade off.
I've barely found time to cook from scratch for the family lately, much less the dog. I have some old stewing hens in the freezer I could cook for her, and have also been giving her homemade treats of beef liver with blackstrap molasses.
This morning I found her curled up in my recliner, comfy as could be. She hasn't been up to climbing stairs or jumping on the furniture the past few months, so obviously she's feeling better. (Not that I've ever approved of dogs getting on the furniture, but she knows I am in a mood to indulge her a bit nowadays.

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I think I am going to try a plan I found online. A half dose of Rimadyl daily along with a g/c supplement. It is supposed to reduce the odds of any toxic build up in the liver. Because she is eating less dry food, I think she is not getting the levels of g/c that she had before. She is not in so much pain that she can't rise or walk, at least, just very stiff and sore in the hips.
Although a new puppy will be on the horizon eventually, I have to say it is not something I am really looking forward to -- all of the housebreaking, obedience training and chewing things up. As long as my old, faithful friend can take herself outside to potty, I am most content to have her around and will do what I can. She's been the sweetest and most loyal dog, and has changed many people's minds about pitbulls due to her gentle disposition. I really miss our long walks together. I just want to make her retirement days the best they can be.