My baby was diagnosed with cows milk allergy and the doctor instructed to follow the milk ladder (you can Google about it). It's to slowly reintroduce dairy products in different stages so baby's body can gradually tolerate it. You have to keep feeding one stage until there's no more reaction to continue the next stage. For my baby the symptom is obvious (red dots appearing all over her face)
May help to cope with the cow milk allergy if u try soy or goat milk. Check with PD first
Reactions include red cheeks
Can get goat milk samples