so sorry to hear the news. I was diagnosed in December also. I am lucky, Pills not insulin. Was put on a 1200 calorie diet, i was always hungry. Best advise i was given ---IT IS NOT just about calories IT IS CARBS.
the formula 30 carbs for breakfast
15 carbs for snack between BR & L
45 carbs for Lunch
15 carbs for snack between L & S
45 carbs for supper
and 15 carbs for bedtime snack IF NEEDED
i rarely eat all the carbs I am allowed, and i no longer feel starved. my sugar is staying between 80-110--depending on the carb load.
PLEASE PLEASE PLEASE watch the sodium content, and if his feet start to bother him have him elevate them above his heart(in the recliner or on the bed with feet propped on pillows) this will help flush the salt back to his kidneys.