Older cat with a boney back
My cat Sassy is about 14 years old now. She's always been very trim, and right now she weighs in around 9lbs. She had her last vet visit a few months back and according to the vet she'd gained weight since her previous visit. So that was great. If I run my hands over her sides I can feel that Sassy's ribs are covered with a bit of padding, and she has a bit of an outward curve to her belly.
My problem is, if I run my hand over her back I can feel every bump of her spine. Her hips are also very boney. The vet didn't seem concerned and all of Sassy's tests (she had urinalysis and a completely blood count last vet visit) came back proving she was in good health. So I've just been trying to put this from my mind and try to convince her to eat more every meal time. She's just not putting any weight on, and I really wish she would...
I'm not sure what to do. She didn't gain any weight when she was being free-fed kibble, nor when she was on canned food. I've been really hoping she'd gain some weight now that she's on raw, but that doesn't seem to be happening. Could this just something that has to do with her age? Like a swayed back being more common in older horses? Or is this something I should be concerned about?