If he is under a year old he should be eating as much as he wants. I've had kittens eat as much as a pound a day of raw. Twice a day is enough, but three is even better if you can. Breakfast, then after work and again before bed. I leave raw out until they finish it or about 8 hours, whichever is sooner. If it is warm in the house or I know I'm leaving it for my work day I will freeze half their morning portion the night before, then put that down as well as the other half unfrozen but in a frozen bowl. This has worked well for me.