adding just a handful of nuts to his snack or a protein shake should boost him up by about 300 calories. i have the hardest time getting my calories in sometimes because i cut out all the brownies and cookies and cake. if i only eat lean meats and veggies i come up way short. so i have to remember that wheat bread is okay and so is oatmeal...i love my whole grains. it would never do me good to take an appetite suppressant. i might never feel like eating if i did.