A.L.
Did you switch completely over to whole milk? What I did was kept buying formula for the first month or so. The first week they got 3/4 formula 1/4 milk. Week two 1/2 and 1/2, week 3 1/4 formula 3/4 milk, and so on. You may want to try that, and have some gas drops on hand just in case. Formula is made to be as sensitive as possible on digestion and milk is milk. Also, you may want to try some acidoplilis (sp) milk for the first few weeks with the formula, them it with whole milk and so on. Worked for us....good luck!!