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Ahorse collar is a component ofhorse harness designed to distribute the force of a load evenly across a horse's shoulders and chest, enabling efficient pulling of a load while not interfering with a horse'swindpipe. Unlike earlier harness systems such as the throat-and-girth arrangement that restricted breathing and limited pulling power, the horse collar revolutionized draft work by allowing horses to exert their full strength without choking. This innovation dramatically increased agricultural productivity and transformed transportation, particularly in medieval Europe.[1]
The collar typically encircles the lower neck in an oval shape and is padded to conform to the horse's anatomy. It supports a pair of rigid curved bars known ashames, which serve as anchor points for thetraces—the straps or chains that connect the horse to the vehicle or load being pulled. By shifting the load-bearing surface to the shoulders, the horse collar enabled horses to outperformyoked oxen, making them indispensable in farming, freight, and urban development.
The widespread adoption of the horse collar around the 10th–12th centuries marked a turning point in rural economies. Horses couldplough fields faster, haul heavier loads, and work longer hours, leading to surplus production, population growth, and the rise of market towns. This seemingly simple piece oftack played a pivotal role in the agricultural revolution and remains a cornerstone of draft harness systems today.
Horse collars are typically constructed from leather or synthetic materials and padded with straw, foam,horsehair, or other fibers. The collar's oval shape is designed to encircle the horse's neck, maximizing contact with the shoulders and chest, while avoiding pressure on the windpipe. This anatomical alignment allows the horse to push forward with its hindquarters, engaging its full body strength.[2][1]
The primary types of collars are full collars, breast collars, and hybrid collars.[1]
Collars are shaped to match the horse's neckconformation, which is critical for comfort and performance, and to reduce the risk of soreness and even injury. The three most common shapes are: full face, half sweeney, and full sweeney. The full face is for relatively straight or slender necks such as for carriage horses. The half sweeney is the most common shape for draft horses as it is heavily padded and allows for a thicker neck. The full sweeney is used for draft horses with extremely thick upper necks such as stallions have.[2][3] The different collar shapes were invented to avoid "sweeney shoulder"—debilitating nerve damage that could end a horse's working career.[a]
Hames are the rigid curved bars—usually made of wood or metal—that sit in the front-facing groove of a full collar. The hames are the rigid structure which maintains the shape and position of the collar; the collar pads the hames. The hames are the attachment point for the load—through the traces—and distributes the load onto the collar, and hence onto the horse's shoulders.[2]
All full collars have hames unless the collar is constructed in a manner where the function is incorporated into the collar itself (rare). Hames come as a pair which are connected at the bottom and top by a strap or metal links.[2]: 140 Hames are usually made of wood, steel, or a combination. Steel hames can be solid or tubular, plated with brass or a white metal, painted, or left bare steel.[2]: 142 Carriage hames typically lie flush along the collar, whereas farm harness hames often extend above the collar and end in "horns".[2]: 64, 159 Hames haveterrets mounted on them—rings through which the reins pass.[2]: 272 Afalse martingale is a strap which runs from the bottom of the collar, between the horse's legs, and attaches to the girth; it helps to hold down the collar and assists in holding the hames to the collar.[2]: 119 In the US, collars fordraft horse showing or parades often sport a tall pointy extension calledhames covers or aScotch top.[6][b]
Properly fitted hames must match the length and curvature of the collar. If misaligned, they can dig into the horse's withers or cause discomfort when the horse lowers its head. Modern hames often include adjustable buckles and reinforced joints to accommodate different collar styles and horse sizes.[2][1]
Long before the horse collar harness, there was the less efficient throat-and-girth harness. This, it was claimed, could be found in many ancient civilizations, according to early 20th century French cavalry officerRichard Lefebvre des Noëttes.[10] This type of collar was supposedly used in ancientChaldea, bothSumeria andAssyria (1400–800 BC),ancient Egypt during theNew Kingdom (1570–1070 BC),Shang dynastyChina (1600–1050 BC),MinoanCrete (2700–1450 BC),Classical Greece (550–323 BC), andancient Rome (510 BC – 476 AD).[11] With this "ancient harness", ploughs and carts were pulled using harnesses that had flat straps across the neck and chest of the animal, with the load attached at the top of the collar, above the neck, in a manner similar to anoxen's yoke. These straps pressed against the horse's sterno-cephalicus muscle andtrachea which restricted its breathing and reduced the pulling power of the horse.[12] Thus, the harder a horse pulled, the more strongly it choked off its own breathing. Because of these supposed physical constraints, oxen were preferred over horses for heavy work, as ox anatomy doesn't have this problem; standard yokes don't choke oxen.
In the 1970s, French riding teacher and carriage driver Jean Spruytte wrote that there were at least three early traction systems depicted in art, none of which choked the horses. Shoulder traction (ancient Egyptian) and breast traction (Greek and Roman) artwork had been misinterpreted in a way that combined both systems but matched neither. This he sought to demonstrate by building reproduction chariots and harness, and testing with actual horses.[13][14]
The throat-girth design was not improved until the Chinesebreast-strap or "breastcollar" harness developed during theWarring States (481–221 BC) era inChina.[15] The Chinese breast harness became known throughoutCentral Asia by the 7th century,[16] and was introduced to Europe by the 8th century.[16]
Its first depiction in artwork was onlacquer-ware boxes from the ancientState of Chu.[17] This type of harness put pressure upon the sternum, where the line of traction is directly linked with the skeletal system of the horse, allowing for nearly full exertion.[12] It was in universal use by the time of the ChineseHan dynasty (202 BC – 220 AD), depicted in artwork of hundreds of different carvings, stonereliefs, and stamped bricks showing it featured on horses pullingchariots.[18] This type of breast-strap harness became known inCentral Asia and elsewhere with theAvars,Magyars,Bohemians,Poles, andRussians during the 7th to 10th centuries.[19] After Central Asia, the first breast-strap harness was spread to Europe by the 8th century (in depicted artwork),[16] and became more widespread by the following 9th century (for example, depicted in atapestry of theOseberg ship burial).[20]
The problem with a breastcollar harness was that the actual shafts of the cart, chariot, or other vehicle are attached to asurcingle (type of strap) around thebarrel of the horse. The breastplate primarily kept the surcingle from slipping back, not as the primary pushing object. This results in the horse literally pulling the load, a less efficient use of the animal.[21]: 162 The modern breastcollar has traces which transfer the pull directly from the breastcollar, but a horse collar still is more effective for pulling heavy loads.
After the breastcollar harness, the next and final evolutionary stage was the collar harness. The collar allows a horse to use its full strength when pulling, essentially allowing the horse to push forward with its hindquarters into the collar. The fully developed collar harness was developed inSouthern and Northern dynasties China during the 5th century AD.[15] The first questionable depiction of it in art appears on painted moulded-bricks in theThree Kingdoms (220–265 AD) era tomb of Bao Sanniang at Zhaohua,Sichuan province, China.[22] These paintings display an amply padded horse collar with no sign of a yoke.[23] However, the earliest legitimate depiction of it in art is on aDunhuang cavemural (cave 257) from the ChineseNorthern Wei dynasty, thepainting dated to 477–499 AD.[24] In this painting the arching cross bar is clear, but the artist failed to clearly show the cushioned collar behind it, without which the whole design would have been rendered useless.[24]
The same basic design is seen in other painted Chinese frescoes, one from 520 to 524 AD (with shafts projecting beyond the horses chest for sternal traction), and another circa 600 AD (Sui dynasty).[25] This Sui dynasty depiction (in cave 302) is of particular interest, since its depiction of the horse collar is not only more accurate (the same seen even in north and northwest China today), but it is used for acamel, not a horse.[26][27] The Chinese had used camels often from the 2nd century BC onwards during the Han dynasty, and there was even a Camel Corps serving the military on the frontier of theTarim Basin.[27] However, the adapted horse collar for camels would not have been common until the 6th century.[27] In cave 156, there is apanorama painting of theTang dynasty Chinese general and provincial governorZhang Yichao riding triumphantly after the recapture and conquest of the Dunhuang region from theTibetan Empire in 834 AD.[28] According to evidence provided by Dr. Chang Shuhong, the date of the painting is precisely 851 AD, yet Needham points out that there is universal consensus amongst historians that it was painted anytime between roughly 840 and 860 AD.[29] This latter painting accurately depicts the horse collar, with a well-padded collar coming low on the chest and rising behind the cross-bar.[30]
The horse collar eventually spread toEurope c. 920 AD, and became universal by the 12th century.[31] The Scandinavians were among the first to use a horse collar that did not constrain the breathing passages of the horses.[32]: 109 Prior to this development, oxen still remained the primary choice of animal for farm labor, as all the previous harnesses and collars could only be worn by them without physical penalty. Additionally, the yoke used to harness oxen were made exclusive to each individual animal. However it was sometimes difficult to cultivate the land; based upon soil condition, it may have taken up to sixteen oxen to effectively use a single heavy plough.[21]: 159 This made it difficult for farmers who lacked the capital to sustain such large numbers.
When the horse was harnessed with a horse collar, the horse could apply 50% morepower to a task than an ox due to its greater speed.[21]: 162 [33] Horses generally also have greater endurance and can work more hours in a day. The centuries-long association that the Europeans had with the use of horses allowed an easier transition from oxen-based harnesses to the horse collar.[34]: 345
The creation of the horse collar removed the previous physical restrictions the old harness had on the animal, and allowed the horse to be able to exert its full strength in ploughing. Originally, the structure of the old harness forced the horse to literally pull its workload,[21]: 162 the horse collar's development instead allowed the horse to push its workload, increasing the efficiency of its labor output.
Following the introduction of the horse collar to Europe and its use being clearly evident by 1000 AD,[35] the use of horses for ploughing became more widespread. Horses work roughly 50 percent faster than oxen. With the collar, combined with thehorseshoe, theheavy plough, and other developments in the agricultural system, the efficiency of the European peasant farmer in producing food increased, allowing further societal development in Europe.[36]: 10 The surplus in food allowed labor specialization as farmers could change their occupation and focus on other skills, such as the purchase and selling of goods, resulting in the emergence of a merchant class within European society. The horse collar was one of the factors in the ending of thefeudal system and transition from the Middle Ages.[37]: 55
The French cavalry officer Lefebvre des Noëttes experimented with the ancient throat-and-girth harness in comparison the later trace breast-harness and then finally the matured form of the medieval collar harness. In his experiment of 1910, he found that two horses (aided by effective traction) using the throat-and-girth harness were limited to pulling about 1100 lbs. (1⁄2ton).[33] However, a single horse with a more efficient collar harness could draw a weight of about1+1⁄2 tons.[33]
However, the findings of Lefebvre des Noëttes were not without challenges, notably the argument that there was an early partial horse collar, a dorsal yoke system, dating to ancient Rome, and that Lefebvre's designs did not accurately reflect those actually used, but rather created an inaccurate design that was less efficient than any actual ancient harnesses used.[38] While Lefebvre's experiments clearly demonstrated that the throat and girth design he used rode up on horses and cut off their air, images from ancient art and partial yokes found by archaeologists suggested that with proper placement and the addition of a stiff partial yoke, the breastcollar remained on the chest, and wind was not in fact cut off while pulling.[39][40] Further studies conducted in 1977 by Spruytte andMary Aiken Littauer, followed up byGeorges Raepsaet, with more accurately reconstructed ancient designs suggested that horses with ancient harness designs could pull nearly as much as with the more modern horse collar.[41] The primary benefit to the use of the modern horse collar, it is argued, was that it allowed a lower point of attachment and in so doing increased the usability of horses for ploughing.[42]
Sweeney shoulder.—This is a rapid wasting away of the muscles on the outside of the shoulder blade. [...] The nerves or blood vessels of the affected part seem to be injured by the pressure of the collar.
Scotch Type Carriage Collar (right) It is made for use with straight hames and it has a cap at the top.
