Allergic reactions typically occur secondary to exposure to an environmental allergen or a bug bite/sting. Mild allergic reactions can result in watery eyes and raised areas of skin (hives). Some allergic reactions can progress to facial swelling, swelling around the airway, and difficulty breathing. In the most severe cases, pets can develop a sudden onset of lethargy, vomiting, collapse, and even death which is known as an anaphylactic reaction. If you think your pet is having an allergic reaction, seek veterinary care immediately as symptoms can progress rapidly.

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