I wouldn't feed him anymore. I have an English mastiff and I feed him 4 cups in the morning and at night. he's about 170 lbs. I think that as long as you dont keepa dish of food out all the time thats the way they eat.

I use to feed my mastiff eukanuba which i thought to be the best on the market then i heard from my pet store that they quit carring it because they changed the formula. It has alot of fillers now.

I think that Iams and eukanuba are owned be the same company now. Im not an expert on dog food but im sure they are fine. I heard that the soup for the dogs soul is a good brand too, but my dog wouldn't eat it.