I would normally only feed orphan lambs 4 times a day- but we do spread out the feeds a bit more. 6.30 am, 12pm, 5pm and 11pm to 12pm for the last feed. Sometimes a greedy lamb will just overdo it at the beginning, and give themselves a sore tummy. Make sure he is taking fluid, even if you have to mix his milk with water to get him to take a bit more.
Beth