Horse teeth, determining the age of the horse
Horses, as you know, herbivorous animals, theoretically they had the whole day to eat the grass – a coarse plant food
They chew, making circular movements of the lower jaw. The front teeth cut the grass, and the back teeth chew the food, creating a food lump, which is then sent to the esophagus.
The horse has the following teeth system:
– incisors – front teeth, 6 on the upper and lower jaws; the average pair of incisors is called hooks; next to them are medium incisors, after which the edges are located.
– fangs – 2 per upper and lower jaws (in mares is rare)
– root – premolars and molars: 12 teeth on the upper and lower jaws. Thus, an adult horse has 40 teeth (mares without fangs – 36)
The age of the horse can be identified by her teeth. They are divided into dairy(Fig.above) and constants(Fig. below.) Milk teeth appear in the foal at an early age; later they fall out and are replaced by permanent ones.
Milk teeth are smaller and whiter than permanent. Teeth grow throughout the life of the horse, they are pulled out of the jaw as they are worn. They wear about 2-3 mm per year. The rate of growth depends on the speed of Erasure. By the age of 30 horses, usually have no teeth. If the roots “end”, the remaining teeth just fall out.
Horse skull, teeth
The determination of the age of the horse produced by the cutters
It is based mainly on three features:
change of milk teeth permanent from 2.5 to 5 years
erasing the cups on the permanent incisors from 5.5 to 11 years
changing the shape of the rubbing surface of cutters from 12 to 18 years and older
Up to 1.5 years the horse has only milk incisors. In 2.5 years fall out dairy incisors and in their place begin to appear permanent, which fully grow to three years.
In 3.5 years the horse erupt permanent middle incisors, which complete their growth by 4 years. In the 4.5 years she had a constant and reaches its full development by 5 years.
How to determine the age of the horse
From 5,5 to 11 years, the cups on the incisors of the lower and upper jaws are erased in this sequence:
In the lower jaw: 6 years cups disappear at the toe; a 7 years on average incisors, and 8 years on the fringes
In the upper jaw: 9 years cups disappear at the toe, in 10 years on average incisors, and 11 years on the fringes
So, when the horse turns 11 years old, its incisors on the lower and upper jaws do not have cups. Cups – recesses in the form of a dark strip in the center of the tooth.For rice. on the left they are, and on the right no longer.
With 12 years old age of horses is determined by the shapes of rubbing surfaces of incisors, which appear in the following sequence: first round, then triangular, and the latter is longitudinally oval (24 years).