Talk:Mustang/@comment-124.183.137.238-20180801081651/@comment-38439752-20190927185859

To breed a tier 4 horse, you need to unlock a T4 certificate from the Purebreeders Society. Go to the Purebreeders Society (link) page to find more information about the certificates and how to get them. Currently you can unlock Holsteiner, Shetland Pony and Arabian tier 4 certificates.