Too many carbs

My son is 13 and has been T1 for just over a year. We manage pretty well with carb counting, and every gram is counted. I believe as a growing boy he needs his carbs, and he currently has approx 180g of carbs in meals per day, with 20-30g added for snacks. Do you think this is too much? He is always hungry and I try to get him to snack on carb-free food. He had lost 1st in the few weeks before he was diagnosed, and still has not managed to put it all back on yet. Any advice greatly appreciated.