In an older baby, it might be acceptable to wait a day or two and see if things improve, but at 6 weeks, babies can dehydrate very quickly and it's always better to be on the safe side. (easybabylife.com)
If you're suspicious that your baby might be suffering from food allergies, consult with your doctor and try eliminating dairy for a few weeks to see if things improve. (halfpintpeeps.com)
These questions will help you determine whether you have a gluten sensitivity or not — if you answer «yes» to any of them, it's a good idea to cut out gluten and see if things improve. (ditchthewheat.com)