When we first got Sissy at 4mo. (who was a rescue) she had tapeworms and was incredibly thin. She was a picker and barely ate. A friend suggested I try Missing Link supplement vet. Strength.
She eats well now but every once in a while she doesn't want to eat. This morning she stuck her nose up at her breakfast. I have a couple of ways to entice her.......1. Some really smelly Parmesan cheese sprinkled on top or 2. dried liver snacks from Trader Joes grated on top of her kibble. This usually gets her attention.
She also may really love the Nutra cal and be holding out for it. They are wise little buggers.