Edit, sign, and share breeding contract for horses online. No need to install software, just go to DocHub, and sign up instantly and for free.The essentials for any horse breeding lease agreement – what both mare and stallion owners should look for in a breeding contract. Contact Breeder for details. 18. Mare Owner will read, complete, and sign this contract. At the end of the current season, Owner shall have the option of rebooking in the following season but contract is only valid for two full breeding seasons. It depends on what the breeding contract says. Breeding contracts vary a lot. Our contract states that the semen is only to be used on the mare states and described in the contract. So, if for some reason the breeding isnt successful the contract spells out what will happen next.