Editing Blood transfusion (section)

== Veterinary use ==
{{Main|Blood type (non-human)}}

[[Veterinarian]]s also administer transfusions to other animals. Various [[species]] require different levels of testing to ensure a compatible match. For example, [[cat]]s have 3 known blood types,<ref name=":7">{{Cite web |title=Blood types |url=https://eclinpath.com/hemostasis/transfusion-medicine/blood-types/ |access-date=2023-10-21 |website=[[Cornell University College of Veterinary Medicine]] eClinpath |archive-date=2024-07-26 |archive-url=https://web.archive.org/web/20240726172733/https://eclinpath.com/hemostasis/transfusion-medicine/blood-types/ |url-status=live }}</ref> [[cattle]] have 11,<ref name=":7" /> [[dog]]s have at least 13,<ref>{{Cite web |last=Cotter |first=Susan M. |date=October 2022 |title=Blood Groups and Blood Transfusions in Dogs — Dog Owners |url=https://www.msdvetmanual.com/dog-owners/blood-disorders-of-dogs/blood-groups-and-blood-transfusions-in-dogs |access-date=2023-10-21 |website=MSD Veterinary Manual |archive-date=2023-09-29 |archive-url=https://web.archive.org/web/20230929055221/https://www.msdvetmanual.com/dog-owners/blood-disorders-of-dogs/blood-groups-and-blood-transfusions-in-dogs |url-status=live }}</ref> [[pig]]s have 16,<ref>{{Cite journal |last1=Smith |first1=Douglas M. |last2=Newhouse |first2=Michael |last3=Naziruddin |first3=Bashoo |last4=Kresie |first4=Lesley |date=May 2006 |title=Blood groups and transfusions in pigs |url=https://onlinelibrary.wiley.com/doi/10.1111/j.1399-3089.2006.00299.x |journal=Xenotransplantation |volume=13 |issue=3 |pages=186–194 |doi=10.1111/j.1399-3089.2006.00299.x |pmid=16756561 |s2cid=29174596 |issn=0908-665X |access-date=2023-10-21 |archive-date=2024-01-03 |archive-url=https://web.archive.org/web/20240103091821/https://onlinelibrary.wiley.com/doi/10.1111/j.1399-3089.2006.00299.x |url-status=live }}</ref> and [[horse]]s over 30.<ref name=":7" /> However, in many species (especially horses and dogs), cross matching is not required before the ''first'' transfusion, as antibodies against non-self cell surface antigens are not expressed constitutively — i.e. the animal has to be sensitized before it will mount an immune response against the transfused blood.<ref>{{Cite web |date=2019-02-26 |title=Crossmatch Testing |url=https://www.vet.cornell.edu/animal-health-diagnostic-center/testing/protocols/immunology/crossmatch |access-date=2023-10-21 |website=[[Cornell University College of Veterinary Medicine]] |archive-date=2023-10-03 |archive-url=https://web.archive.org/web/20231003002729/https://www.vet.cornell.edu/animal-health-diagnostic-center/testing/protocols/immunology/crossmatch |url-status=live }}</ref>

The rare and experimental practice of inter-species blood transfusions ([[xenotransfusion]]) is a form of [[xenograft]].