How many different blood types can a dog have

Never gave it a thought.

Most animal blood banks are a part of your local emergency vet services. They are always looking for donors. Here is the one in Seattle and they have some info you might enjoy.

http://criticalcarevets.com/bloodbank.html

Very intresting.
I have no idea.
I no there is more than one though.

2 it is called a Chimera. This can be done in a lab or in nature.

Dog blood type is different than the types found in people. There r 6 major blood types. 42% of dogs have the same type which is universal. Recipients need to be matched to the appropriate blood type.
Blood is made up of a liquid called plasma & red blood cells, white blood cells, & platelets. Oxyglobin is a synthetic blood substitute that is sometimes used to treat dogs that r anemic (too many red blood cells) or have lost blood. The red & white blood cells & platelets r made in the bone marrow & then released into the plasma to be circulated throughout the body. There r 6 major dog blood types out of a possible 12, but 40-45 % of all dogs have a universal dog blood type. Sixty percent of Greyhounds have a universal blood type. Boxers, Irish Wolfhounds, German Shepherds, Dobermans, & Pit Bulls r often universal donors as well. This is important because only dogs with a universal dog blood type (DEA 1.1 negative) can be blood donors. Most dogs can receive the universal dog blood type, regardless of their own blood type. Tests r available to ensure a good ''cross match'' between ur dog & the blood donor.

In an emergency a dog can receive a transfusion from another dog that is of a different type since dog blood does not have antibodies. After the first transfusion antibodies develop which require that a good ''major crossmatch'' is achieved between compatible donors.

To ensure ur pet’s safety if a blood transfusion is ever needed, it’s a good idea to know his blood type. A quick & simple blood test is all it takes for ur veterinarian to type ur dog’s blood. It’s recommended that all dogs have this procedure done as part of a well-visit to the vet & that owners know this information in case it is ever needed.

They have around 13 types, it is very complicated compared to ours.

http://austintabb.com/canine-blood-type.html