I thought the same Sterling. That would be an enormous grey! When Alex is upset is his breast bone (not sure that is the correct term) very prominent? That is what my vet said they look at to determine "thinness."
Cats are like greys that way, some are picky and some are not. My Siamese (pure breed) will eat shoe leather if it smells like tuna and anything else. I have an alley cat who will eat only Purina One dry food. Period.
LOL Happy birthday anyway! I feel you pain. I sprout, shred and cook my little heart out too and Timber gives it the cold shoulder. When dad eats his pizza spaghetti, he is all about that!