###Human: Can kitten allergy in family members make me allergic too? ###Assistant: Hi.  Allergy can run in families, you have a chance of being allergic as your father and brother are allergic to cats but not a must. Being close to cats in the past for many years is a good indicator that you might not be allergic to cats but still allergy can develop at any age. You can do a skin allergy test by a dermatologist (skin doctor) to know if you are allergic to cats or not. Skin allergy test. ?Allergy. Avoid contact with cats, if proved to be allergic.