The adder, Britain’s only venomous snake, generally prefers open habitats such as heathland, moorland and woodland, but in Norfolk they can also be found in sand dunes – all places dogs love to explore. Adder bites can be extremely dangerous. The bites can cause swelling, bleeding or fever. If you think your dog has a suspected adder bite, keep it as quiet and calm as possible, and see your vet urgently. Signs that a dog has been bitten may appear quickly and can include small puncture wounds, swelling, bruising, pain, lameness, salivation, vomiting, increased temperature and bleeding and may affect the heart beat, blood pressure and breathing rate. Do not apply a tourniquet or attempt to suck out the poison as this can add further complications.