IMHA is a condition of the blood that causes severe anaemia. IMHA causes the body (more specifically the immune system) to attack and destroy its own red blood cells.
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.
Just like people, it is possible for a dog to have an allergic reaction to something such as a bee sting, a medication, or a vaccine.