 [ Symptoms ] can children die from a cat allergy [ Disease ] when it comes to severe life threatening anaphylactic reactions just about any allergen could trigger a fatal response in some highly allergic people peanuts do it beestings do it i guess it is possible that cat dander could do it too but i have never heard of a case have your doctor or allergies order a blood test for cat dander rast test and see how high the reaction might be