How can you tell a horse's age using teeth?

Answer:
By looking at a horses teeth as it ages its incisor's -or front teeth- slope more, and there surface markings change.
-6 months :When a horse is around six months, it will have two large teeth at the front and two smaller teeth on each side on its upper jaw.
-2 years : By that age the horse should have six equally large teeth on its upper jaw.
-5 years :Two small pointy teeth will begin to grow at the back of the horses upper jaw, away from its front teeth.
-9 years :The two back pointy teeth will be a decent size and will be close to the front teeth.
-15 years :The teeth will begin to grow weaker and will chip easier and should have many marks on the surface of the teeth.
-25 years : The teeth will be small and tight together at the front the horse will have more trouble eating and the teeth might be sensitive.
Source: Horse & Pony Fact-file An/essential guide to the world of horses and ponies Pg 8 (Introducing horses and ponies.)
First answer by Namo111. Last edit by Namo111. Contributor trust: 25 [recommend contributor recommended]. Question popularity: 5 [recommend question].