Sorry,, I don't know Popeyes story (I really need to catch up). BUT.........

baby food, any meat will do.
KRM (kitten replacement milk) found at the pet store.
goats' milk. (will not upset tummies like cow's milk)
Nurti-cal. a very good suppliment for ANY cat not eating a proper amount. You can actually take small "drops" of this and place it on the roof of the mouth, if they don't lick it off your finger.

good luck.