The gods have given your horses the ability to breed.
Both stallions and mares must be at least 3 years old.
The gestation period is around 3 months.
During this time, the mare will not be able to enter shows. Neither the stallion or the mare will be able to breed again before the new foal is born.
To make a stallion available for stud, go to your stable and select it.
If you find a stallion that is available for stud, click on Request Stud and you will see what's next