transitioning shouldn't take a few weeks unless you don't want to waste the iams so your taking your time with it. there's nothing wrong with that but since he's showing itching signs i'd finish the transition to the avoderm over the next few days and see how he does just on that for a few weeks. it can take up to 3 months for a food switch to show results when your dealing with allergies (or signs like it).
__________________ Kellie  and  Morgan |