My son is 22 months old and he has completely lost appetite. He was breasfed for the first 6 months of hid life and used to eat well. He is now losing wieght and going down on his percentiels. We have checked with doctors and there are NO apparent problems with him. He is growing in height, active and developing normally. Anything to boost his appetite and immune system would really help. He has become an extremely fussy eater and also has frequent viral attackes of cold and cough. Please help a worried and concerned mother.