Lymphoma is a cancer of the immune system. The immune system is active throughout the whole body, and lymphoma can develop in any part of it. Symptoms vary depending on what type it is, where it is, and how aggressive it is.
Dogs can have allergic reactions just like people. Common triggers include insect stings, plants and medications (including vaccinations).
Chocolate contains a substance called ‘theobromine’ which is toxic to dogs and cats. It’s similar to caffeine and can cause problems with the nervous system, bowels, kidneys and heart.