What do you mean by "he really isnt eating all that great should he be eating 2 or 3 times a day"?

Do you mean, he's not eating 2/3 times a day but eating once? Or.. not eating at all?

As for chewing, even if he absolutely must chew something, it should never be everything he sees. Provide alternatives for him to chew on and make it clear that he isn't allowed to chew on your things.