However, as mentioned above, the white pulp of the spleen helps to fight infections, so dogs without their spleen may run a higher risk of having infections. Yunnan Baiyao for Canine Spleen Cancer There is a Chinese herbal medicine called Yunnan Baiyao that is very effective in stopping bleeding, so it is a good medicine to have for dogs with bleeding cancers, such as hemangiosarcoma in the spleen.