Hello how may I help you? I need some advice about my pet. I can help you with that, what kind of pet are we discussing? My dog he's a rottweiler What is his name? Bob What seems to be going on with Bob? I want to know how much dog food should I be giving him. I feed him twice daily. How much does Bob weigh? 120 lbs OK, for a 120 lb dog you should be giving him 4-4 1/2, 8 oz cups of food twice daily for a total of 8-9 cups of food a day That seems like a lot. Thanks for the information