By working with local Amish farmers, we bring you the most humane, fresh, potent, peak estrus mare in heat urine available. Ken Capling’s Yukon Gold is only collected during the actual breeding process, this guarantees the highest level of available estrus in each bottle. Discovered by the earliest wranglers, who occasionally would have a bull moose follow his nose right into their string of horses, mare in heat urine has been used for centuries as a moose attractant and cover scent for hunting mature bulls.