Your veterinarian can best advise you when your horse is ready. Consult your veterinarian on how long it will take your stallion to stop displaying stallion like behavior. Gelding your stallion will not change his personality, but it will make him more predictable and easier to handle. After a stallion has been castrated he is called a gelding. Some horse handlers believe geldings are more even tempered than stallions or mares.
Geldings have a tendency to fight less with other horses.
Although some mares may exhibit signs of nervousness when they are in season, most show little, if any, difference in personality during this time. If you adopt a mare over the age of two, there is a possibility that she may be pregnant. Often wild horses do not exhibit the round, full-belly look usually associated with pregnancy until the last trimester, or they may not show at all. Even if your veterinarian is not able to give your mare a complete examination, he or she will be able to teach you what signs to look for. Adopting a pair, a mother and a foal, is both an exciting idea and one that will bring additional responsibilities.