A gelding given testosterone injections every 2 or 3 weeks. Testosterone is now a controlled drug and not often used. A pony stallion which tends to be inexpensive to buy, and easier to handle. The mare's behavior is noted as the stallion approaches her. Accuracy of heat detection tends to be low since shy mares may be difficult to approach.
Labor costs are low.
Accuracy of detection of heat is high only if someone is there when the mare approaches the stallion. Injury due to breeding attempts though the fence is common. Labor costs are fairly low. The opposite sex horse is brought to the stall and contact occurs across the stall door. Accuracy of detection of heat is acceptable, and labor costs are moderate.