Your horse doesn't have to be a specific age. Your horse has to be eight months pregnant, I believe, in order for you to find out the gender of the foal and a general idea of what it's going to look like.
look on horwse
Use a Black Orchid.
When you have been on Howrse long enough you can buy a Horse from the auctions or Private Sales
you can try horse land and horwse but i think horse isle is more fun
Winter
You cannot remove a horse from the safe haven on Howrse. Once the horse has been put in there it cannot be retrieved. You can revive a horse that was put into 'Heaven' so long as it is under 25 years old and you use a Pandora's box.
To train your horse you have to press the little plus sign beside the bar that you'd like to train them in.
you have to click on the male and female gender sign, then select your stallion or mare, then wait and see if they have a foal(technical word for baby horse!)
on howrse if you won the auction the site will automatically take the equus off of your account, and the horse will apear in your horse tab.
Go to the horse's page and click the tab marked Genetic (located right below the horse's picture) Under the Genetic Potential, you should see the horse's BLUP.
if that is for the riding leval test (horwse) the answer is true.
If the horse is over 25 years old and not immortal, the horse will start losing a bit of its health everyday, which is natural, you can prevent this by making him immortal, or using a black orchid. If the horse is under 25 years old, it is most likely because you are feeding him incorrect amounts of fodder, making it over/underweight. Follow the instructions and the warnings when feeding your horse.