Bring back the cat you used to know.
The bloodwork came back normal. The vet said "she's just getting older." But a cat who cleans her bowl shouldn't be wasting away. As cats age, many stop making the carrier that pulls B12 out of their food, so it goes straight through her. PetLovies goes in through a second entrance that doesn't need that carrier. She finally uses the food she's already eating, and the weight comes back.