A stud service is the act of mating a male animal with a female animal that is in heat. A stud is the term referred to the noncastrated animal that is used for breeding purposes. The practice of breeding through stud service is popular among dogs, horses and cattle.
Both female and male animals may be used for stud services. Stud females are usually used to breed new stud animals, while male studs are generally used to improve the breed and for crossbreeding purposes. The stud animal must be free from genetic illnesses and be from a great breeding line for a successful stud service to take place.