No matter what the cause, an allergic reaction can occur immediately or up to 48 hours later. These reactions can range from mild to severe and life-threatening, so if your dog shows these signs, contact your veterinarian as soon as possible. 24 янв. 2017 г.
How quickly does an allergic reaction start in dogs?
The swelling occurs 30 minutes to a few hours after the exposure. A veterinarian will often give dogs with this reaction an antihistamine injection. Untreated, it may take a day or two for the swelling to subside. A different reaction we see 6 to 24 hours after exposure to the antigen is hives.
How do I know if my dog is having an allergic reaction?
In the dog, the most common symptom associated with allergies is itching of the skin, either localized (in one area) or generalized (all over the body). In some cases, the symptoms involve the respiratory system, with coughing, sneezing, and/or wheezing. Sometimes, there may be runny discharge from the eyes or nose.
Do pet allergies happen immediately?
Symptoms of a cat allergy may develop in just a few minutes or take hours to appear. About 20 to 30 percent of people with allergic asthma have severe flare-ups after coming into contact with a cat. Rhinitis (runny nose and congestion) seldom becomes severe before 15 to 30 minutes.
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