Of the top of my head I would say Kitten Food as that has extra calories and nutrition. Or some Chicken Of The Sea or Star Kist Tuna or a little Deli Chicken. Thats what I am going to use to put some weight back on Precious alonfg with Eukanuba Canned Vet Formula if she likes it.
If not theres always that Secret Weapon
FANCY FEAST!!!!!!!