Is my 5-month-old getting enough to eat?

My 5-month-old recently began teething. Now he consumes only 20 ounces of milk a day and three meals of cereal and fruit. Is he getting enough to eat? And is teething causing his lack of appetite?

It sounds like he's getting enough to eat - 20 ounces of milk is an adequate amount. Make sure you're not feeding him too many solids, which can compete with his milk intake. But he's probably eating less because it hurts to suck. The teeth coming through act like a foreign body in his gums, making them swell - the way a splinter in your finger makes it swell. When he sucks, the blood rushes into his gums, adding to the swelling, and sucking becomes even more painful. Try to relieve the pain before you feed him. Wash your hands and rub the front gums gently with your finger - it should ease the swelling and pain.