Is he still losing, Nanci? There should be a point while LCing where the fat loss stops - when your body has decided this is 'it'. If he's not losing anymore and if he's eating enough to keep himself happy and well fed then I don't think I'd worry about it.

If he is still losing and wants to stop then perhaps increasing calories might help. A few extra ounces of macadamia nuts is 600 calories more. Maybe a LC bar might stall him

Congrats!
Nat