Fiona is little too! We've kept an eye on her weight and she seems to be just fine. At 15 months she is still under 18 pounds. I think Katmai is doing great! What has helped Fiona is adding fats to her diet. I drizzle flax oil over just about everything, cook with coconut oil, give her coconut milk yogurt (since she doesn't handle dairy well), mix cocunut milk in with her rice... Just adding good fats to what she eats anyway.