Bee and wasp stings in Pets

Most bee and wasp stings cause brief swelling, but allergic reactions and multiple stings are emergencies. Learn safe stinger removal, the warning signs and when to see a vet.

What It Is

Bee venom contains melittin, phospholipase A2 and other proteins that cause pain and swelling; wasp and hornet venoms are similar. Most stings cause only local swelling, but pets can have allergic reactions, and many stings at once can damage muscles, kidneys and blood cells.

Where Pets Come Across It

Dogs and cats snapping at insects in gardens, disturbing ground nests of wasps or yellowjackets while digging, or knocking into hives. Stings are most common on the face, mouth and paws.

Which Animals Are Affected

Dogs and cats. Small pets and those stung many times are most at risk. Africanized honeybees in the Americas sting in large numbers when defending their hive.

Published Toxic Dose

No owner-usable mg/kg figure exists. The relevant measures are the number of stings, their location (mouth and throat stings can block breathing) and whether your pet has reacted before. The calculator does not grade stings by mg/kg.

Signs and How Soon They Appear

Within minutes: pain, swelling, redness and pawing at the face. Allergic reactions can appear within 15 to 30 minutes: hives, facial swelling, vomiting, diarrhoea, pale gums, weakness, difficulty breathing and collapse. After many stings, dark urine and weakness can develop over the next day or two.

What to Do Right Now

If a bee stinger is visible, scrape it out sideways with a card. Apply a cool compress. Go to a vet immediately if your pet has swelling of the face or throat, trouble breathing, vomiting, weakness or many stings. Do not give human antihistamines or other medicines unless a vet advises a specific product and dose.

Frequently Asked Questions

Sources and References

• Merck Veterinary Manual: Wasp, Bee, and Ant Stings to Animals
• ASPCA Animal Poison Control Center

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