smartcookie, it’s possible that your child is not chewing his food properly (also called “pocketing” food) because the muscles in his mouth aren’t strong enough. Low oral muscle tone can also cause speech difficulties. Speech therapy targeting the appropriate muscles can help with both problems.
If your child also has speech difficulties, google the words “early intervention” with the name of your state to find out about how to get your child evaluated. Often the evaluation can be done for free at your home.