Cats have three blood types, A, AB and B. Cats have naturally-occurring antibody against other blood groups. Type B kittens have high levels of anti-A antibodies and acute transfusion reactions can occur when type B kittens are given type A blood. Type B cats should only be given type B RBCs, and type A RBCs should never been given to type B cats. RBCs from type B cats can be given to type A or AB cats.
Whole blood (3 ml minimum volume)