I agree. Like Sparkle, Foxy is almost 13 and very skinny, but full of energy and life.
Foxy lost quite a bit of weight in about 6 months and we tried everything we could think of. In the end we gave up and let her have what she likes 1/2 a can of cheap smelly canned food with her good kibble. She gets Missing Link and fish oil caps plus chicken necks and backs plus veggies and pasta a few times a week. We also treat with a lot of peanut butter. I will also mix a couple of tablespoons of peanut butter with her kibble. Anything to get enough calories into her. Since feeding her what she likes, I am starting to see less bone. At this point I'd like her to gain about 5 lbs, so here's hoping.