Has anyone overcome a weight gain issue in a fed baby, WITHOUT supplementing?

I would like to help you on this but I am no expert. I do feed, but my girls always gained weight consistently. Maybe there is a problem,not with your milk, but with the babies ability to gain weight. I know a mother who had a similar problem and her son was diagnosed with Chrones disease. I am not saying that is the problem with your baby, but if you are really concerned have them do some test before you switch to formula. If he isnt losing weight I dont understand the big deal. Hopefully he will gain weight this month and be back to normal. good luck