Actually, he should be getting btwn 3-4 medallions at his age/weight. Have you used NV's interactive feeding guide? It is here:
http://www.naturesvariety.com/ifc.la...0DDDvnl30A6F0B
At a wt. btwn 2-3 lbs., for a puppy who has 50-80% of his adult weight - it recommends 3 medallions for 2 pounds, and 4 medallions for 3 pounds.