Teasing Mares

Accurate estrus detection in mares is important on any horse breeding farm. One form of estrus detection is teasing. This article presents information on detecting mares in estrus using different teasing methods.

Teasing Mares

The teasing of a mare with a stallion is an important job in a breeding program as it allows breeding managers to determine the stage of an individual mare’s estrous cycle. Accurate determination of estrus (heat) allows breeding managers choose the best time to breed the …

Breeding Shed Equipment

Farms Using Artificial Insemination

Most farms using artificial insemination will have at least two pieces of equipment: a phantom and insemination chute.



The use of a mare phantom or “collection dummy” removes the need for a mare during semen collection. Once trained, stallions will serve the A.V. while mounted on the phantom. Phantoms are padded cylindrical tubes positioned above the ground with one or two pipe legs.

Phantom dimensions vary between farms; however, most are between 5 and 8 …

Mare Anatomy Exam

Reproductive Organ Examination

Palpate the mammary system for evidence of mastitis, abscessation, neoplasia or injury. Before examining the external reproductive organs, wash and disinfect the mare’s perineal area and wrap the tail. Examine the vulva for conformation, apposition, tone and evidence of discharge. Poor conformation of the vulva lips and vulva itself will predispose the mare to problems like pneumovagina (windsucking) and fecal contamination of the vagina. Gently separate the vulva lips and listen for the passage of air into …

Estrus Detection of Mares

Management of the Mare’s Estrous Period

Breeding managers are generally concerned with four aspects of reproductive management during the ovulatory period—detection of estrus, mating management, pregnancy determination, and estrous cycle manipulation.

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Detection of Estrus

Palpation and teasing are the two most common management tools used in the detection of heat. Rectal palpation and ultrasonography will help define the time of ovulation, and thus aid in mating management. Parameters of follicular size, follicular consistency, cervical size and consistency, and uterine tone …

Mare Reproduction

Typical Cycle

People who have bred many mares soon realize that each mare is an individual and there may be many variations in the reproductive cycle length between mares. There is, however, a basic cyclic pattern that “most” mares will follow. Typically, during the breeding season, a mare will have a 21-day estrous cycle (the interval from one ovulation to the next). This length will vary between mares and time of the year. The estrous cycle is divided into two …

Mare Records

It is extremely important to keep accurate records of each mare’s reproductive status. Breeding, teasing, palpation, and health records are examples of some of the essential record types necessary to assist in attaining maximum productivity. Breeding records should include mare identification, breeding dates, health comments, and expected and actual foaling dates. Health records should identify the date and description of health care, including the person who administered it. The teasing record includes identification of the mare, teasing dates, teasing codes …

Horse Behavior at Foaling Time

Behavioral traits associated with parturition (the birth process) are deeply rooted in the evolutionary development of horses. A basic assumption is that horses have evolved behavioral strategies that ensure their survival. During the birth process, both the dam and her offspring are in a weakened state and are susceptible to attack by predators. The mare takes steps to increase their safety during parturition. In general, these steps include locating a safe site for foaling, quickening the process, minimizing evidence of …

Horse Breeding Behavior

It is important that horse owners and breeders understand and recognize the basics of equine reproductive behavior for management purposes. This article discusses the main behaviors associated with horse breeding.
An understanding of the basics of reproductive behavior is important. This understanding can lead to management applications that can improve reproductive success. It is important to recognize the behaviors associated with a mare in heat, a mare that is receptive to a stallion, mating, signs of foaling, normal behavior after

Foal Management During the Preweaning Period-Creep Feeding & Halter Breaking

In order to protect the initial investment in the foal and to optimize its health and productivity after birth, horse owners should practice good horse management, including gentling, halter breaking, creep feeding, and overall health care. This publication outlines management steps a horse owner can take during the preweaning phase of the foal’s life to ensure optimum health and future productivity of the foal.
During the preweaning, or suckling, phase of the foal’s life, the foal is growing rapidly. It

Heat Detection and Teasing Systems for Mares

An observant teasing manager, an effective teaser and a safe, efficient teasing system are the bases for accurate heat detection in the mare. The following article discusses the process of heat detection in mares and the different methods of heat detection used.
The process of heat detection, which is determining the sexual readiness of a mare, is critical in the breeding process. Heat detection using the mare’s response to a stallion is known as teasing. The teasing process is necessary