Thoroughbred horses are given a birthday of August 1st regardless of the actual birthdate to keep the age groups easily defined for race conditions. The second birthdate would be the actual born on date.
Hammurabi had two birthdays because he believed in reincarnation!
Thoroughbreds are purebreds with a closed studbook, therefore only two Thoroughbreds can create a Thoroughbred foal. No other breeds are allowed or used.
Prob(two sets of matched birthdays) = 1 - [Prob(No matched birthdays)] + [Prob(One set of matched birthdays)] = 0.63
quarter horses and thoroughbreds
Nursery
Two Thoroughbreds - 1939 is rated/received certificates of: Netherlands:AL (original rating) (1940) Sweden:Btl USA:Approved USA:Passed (National Board of Review)
Nursery
Nursery
Two Thoroughbreds - 1939 was released on: USA: 8 December 1939 Sweden: 16 March 1941 West Germany: May 1964 (TV premiere)
England native mares and Arabian
You can find Thoroughbreds on grass.
They have an ancestry of Quarter Horses and Thoroughbreds.