Puppy Beagles consume more food than adults as the pups need a lot of nutrients for growth. Beagle pups below six months of age should ½ cup of a meal (233 cal) thrice a day. After they attain one year, you can start feeding them 11/2 cup of food (576 cal) twice a day. Senior Beagles consume fewer calories as they won’t move much. They can be fed around 300-400 calories twice a day or as per the vet’s requirement.