For the past week I have been fostering a 12 month old male boerboel. We normally walk him twice a day and play with him on and off until bed time, for the rest of the day he sleeps. We were told to only feed him one cup of dry food in the morning and one cup of dry food at night. He normally scoffs this down and continually returns to his bowl wanting more.. he's skin and bones! I feel like he should be eating more? Or is this enough?