Colt ( horse ) - wikipedia Colt ( horse ) For other uses, see Colt. A colt is a male horse, usually below the age of four years. Description The term `` colt '' only describes young male horses and is not to be confused with foal, which is a horse of either sex less than one year of age. Similarly, a yearling is a horse of either sex between the ages of one and two. A young female horse is called a filly, and a mare once she is an adult animal. In horse racing, particularly for Thoroughbreds in the United Kingdom, a colt is defined as an uncastrated male from the age of two up to and including the age of four. An adult male horse if left intact is called either a `` stallion '' or a `` horse '' ( sometimes full horse ) ; if castrated, it is called a gelding. In some cases, particularly informal nomenclature, a gelding under four years is still called a colt. A rig or ridgling is a male equine with a retained testicle or one which has been incompletely castrated. In the wild, colts are driven from their herds by the herd stallion somewhere between the age of one and two. This may be in part an instinct to prevent inbreeding. When driven out, they usually join with other young stallions in a bachelor herd. They stay with this band until they are mature enough to form their own herd of mares. The terms `` rag '' or `` rake '' have been historically used to refer to a group of colts, but they have fallen out of modern usage. Colts of different ages A weanling colt A yearling colt A two - year - old colt A three - year - old colt References Jump up ^ This definition is preferred by OED, Merriam Webster, Saunders Veterinary dictionary, Websters ( with narrow exceptions ) and Collins Jump up ^ `` Colt Define Colt at Dictionary.com ''. Dictionary.reference.com. Retrieved 2012 - 10 - 21. Jump up ^ Waterman, Jack ( 1999 ). The Punter 's Friend. Harpenden, Herts, UK : Queen Anne Press. ISBN 1852916001. Jump up ^ Summerhayes, RS, Encyclopaedia for Horsemen, Warne & Co, London & New York, 1966 Jump up ^ Barrows, Edward M. Animal Behavior Desk Reference. CRC Press, 2001. p. 296. Jump up ^ Oxford English Dictionary 1933 : Rag External links Wikimedia Commons has media related to Colt ( horse ). Look up colt in Wiktionary, the free dictionary. Retrieved from `` https://en.wikipedia.org/w/index.php?title=Colt_(horse)&oldid=801086392 '' Categories : Types of horse Male horses Talk About Wikipedia Euskara Polski Edit links This page was last edited on 17 September 2017, at 15 : 47. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: at what age is a colt considered a stallion
Answer: a colt is defined as an uncastrated male from the age of two up to and including the age of four