A colt horse is an uncastrated male horse up to four years of age. Once it is four it is considered a stallion. Stallions are usually used for breeding. Deciding to breed horses should not be done lightly. There are many considerations to be made when deciding whether or not to breed your mare (female horse). It is a big expense, and takes eleven months until the foal is born. It is also important to know if your mare is healthy and free of any hereditary faults or disease that she could pass on to her foal.

Breeding Colts
Once you have decided to breed your mare, the next step is choosing a stallion. The stallion should be selected to complement the mares build and personality, not to exaggerate any faults she may have. You may wish to breed to a specific breed, or your main concern may be performance, height or even color. If you are breeding for color, there are books available that contain many photographs of equine coat colors.

Once, mare owners were limited to stallions that were close by, or faced the expense of sending their mares off to breeding farms. Nowadays, with artificial insemination and frozen semen, the geographical barriers are not an issue and mare owners may select the stallion of their choice, no matter where he happens to be.

There are many options in finding the right stallion. There are online databases that list stallions by breed, by name and by region. This seems to be the most convenient and sensible way to search. Once a person has established a successful breeding farm, he or she will be able to raise the young colts up into stallions who can carry on the breeding tradition.