I'm not sure I read the first post on this but I gathered a 4 month old boy weighting 20 lb? As others have posted, there is very little link between obesity in infancy and adult obesity. It's when they get to be older children and teenagers that the association is great. At any rate, I think it is important not to assume that since he is being fed the appropriate food (breastmilk), that he is also necessarily being fed the appropriate way (on demand). While a "diet" or milk restriction, solids, etc. are clearly not necessary, it may be a good time to make sure mom is picking up well on baby's signals of hunger and fullness. Is she feeding automatically or is she also trying other calming techniques (rocking, wearing baby, etc)? Is she concerned that baby suck for a certain amount of time or doesn't feel that he's had enough? Does a chubby baby equal a healthy baby for her? Someone asked about Tiny Tummies. Thanks for asking! It is a nutrition newsletter for parents and children. I focus on nutrition from pregnancy through teens, with emphasis on healthy eating and lifestyles for the whole family. The newsletter includes articles, recipes (mostly vegetarian), current pediatric nutrition information, Nutrient of the Month, healthy lunches, etc. Email me if you would like more information. [log in to unmask] Also, I always welcome "news" on breastfeeding so please send me anything you think would be of interest. Sanna James, M.S., R.D. Editor, Tiny Tummies Nutrition News Mill Valley CA