Veterinarian urges calm as dog snake bites rise this summer

More dogs than usual have been bitten by adders this summer, SVT reports. Veterinarian Henrik Rönnberg says owners should remain calm, keep the animal still and seek veterinary care quickly.

Several veterinary clinics have reported an increase in adder bites this summer. In June, the animal care chain Evidensia reported a 63 per cent increase in bites in May compared with the same month in 2025.

Rönnberg, chair of the Veterinary Association, said the warmer weather was probably behind the increase, as more people spend time outdoors while snakes lie in the sun.

Dogs are usually bitten on the nose, and symptoms generally appear quickly. The bite causes severe swelling, Rönnberg said.

If a dog has been bitten, it should be taken to a veterinarian without delay. Owners should also prevent the animal from becoming stressed or walking and running long distances.

“If you have a small dog, carry it and do not let it walk on its own. The more physical activity there is, the more easily the venom spreads,” Rönnberg said.

Both small and large dogs can become seriously ill after an adder bite. Most recover, although some need antivenom.

Rönnberg recommends a follow-up veterinary examination even when the outcome is positive. Dogs affected by a bite should return after about two weeks to have their heart and kidneys checked, he said, because lasting effects can occur.