some people start training foals at the age of 2 or 3
A foal can be lunged in large circles at the walk at very early ages. However, a foal should not be put on small or fast circles until it is 2 or 3, as small fast circles cause alot of torc on joints, and will damage young horses knees more than it would an adult horse. Even at 2-3, the horse should not be lunged faster than a slow canter on at least a medium sized circle.
1 year old; from then until age two it is a yearling.
as soon as your horse's feet start to grow longer than they should you should schedule an appointment with the farrier or ask another horse expert for advice.
A horses should be at minimum 3 years old. Any age before that and their joints have not fully closed and it will cause problems later in life. That being said many people believe a horse should never jump before it's 6 years old, which is when the horse is most likely 100% fully grown and done 'forming'.
the horse has to be 3 years old to get a GA
you should barrow your horse
A horse should never be ridden before the age of two years. However it is best to wait until the horse is four or five years old before riding them as this gives them time to fully mature and develop.
Depending on the condition of the horse, all ages of horses should be trained.
Keep your horse and get an old car. :)
46 years old
Well in general a horse of any breed should not be broke to ride before they are 3 years old. This is due to the fact that before the age of three most breeds of horses growth plates haven't "closed" yet. But you can work on the ground with a saddle on the horse at the age of 1 1/2 - 2 years old to get the horse use to being saddled. But there are a lot of different exceptions to this rule due to bone maturity of the horse, weight, height, etc. But a good rule of thumb is to ask your vet to check over the horse to see if he is ready to start getting under saddle.
you should train a trotting horse at the age of 5 years old.
at 2 or 3 years is best but should probably be done by 6.