is it easy to tell if your baby has a cow's milk protein allergy not always cmpa is caused by hypersensitivity of the body's immune system to the protein in cow's milk signs can include colic rash or irritability at or after feeding time depending on whether it's ige or non-ige symptoms can appear immediately or days later it can be managed by eliminating milk and dairy products for breastfeeding women or formula fed infants may need to switch to a hypoallergenic formula such as Nutramigen a plus with LGG clinically proven to quickly reduce colic due to cmpa it now has LGG culture a friendly bacteria that can help with cow's milk protein allergy management to learn more speak with your doctor and ask about Nutramigen a plus with LGG learn more about Nutramigen a plus with LGG at enfamil.ca foreign