he should have hired one who could help him figure out healthier ways to get sleepy.
Hard physical labour all day long will zonk you out nooo problem. I suggest working on a farm, preferably with animals. Haying, mucking stalls, milking, digging in the garden, mowing grass by hand with a push mower, chopping wood... any of these types of chores (plus a whole raft more) done all day long will make you sleep like a baby!