I too feed Natures Menu, and Saba (30kg) has 500g daily, or less if he starts to lose his waistline. He also has raw bones, but he won't eat mackerel chunks, and he's not fond of any foods containing fish. In the past, he's had Just Natural complete chunky minces which are available in the recommended 80/10/10 combination of protein, bone and offal, but fussy as he is, he soon stopped eating those minces. He also refuses chicken carcasses, but loves lamb ribs, beef ribs, turkey and duck neck, so go figure! Once a week, I give him a whole raw egg, and he spends a few happy minutes playing with it before demolishing the lot, shell and all! I add 5ml of cod liver oil to his meal as his coat is a bit dry. There's not so much poo, and what there is is less offensive, and now Saba happily eats the food in his bowl rather than looking at me as though I'm trying to poison him!