Chronic allergies in a Goldendoodle are usually a management problem, not an emergency one — but two situations change that. The first is a true acute allergic reaction: sudden facial swelling, hives spreading across the body, or labored breathing within an hour of exposure to a new food or a sting. That needs an emergency vet visit immediately.
The second is a severe secondary ear infection. A Goldendoodle's ear canal holds warmth and moisture well, which is what yeast and bacteria need once allergy-driven inflammation breaks down the ear's normal defenses. Head-shaking that won't stop, a strong odor, dark discharge, visible pain when the ear is touched, or a head tilt mean the infection has progressed past simple cleaning-and-drops and needs same-day attention.
Outside those two patterns, ordinary seasonal itching, occasional paw-licking, or mild redness between the toes is what most Goldendoodles will have at some point and can typically wait for a routine, non-urgent vet visit.