Too many low level players have too many horses, so some changes will occur in the near future.
Specifically, a player will not be able to have more horses than its own level.
Therefore:
A level 1 player can have only one horse
A level 2 player can have only two horses
A level 10 player cannot have more than 10 horses.

Therefore if you have 70 horses, you'd better advance to level 70, or let someone else keep your horses.

Also, note that having more than 10 horses in one account is not recommended, and it is likely that in the future you will have to purchase some kind of license that would prove that you are indeed playing with those horses.

We do not want thousands of level 1 horses starving to death therefore this change is aimed to improve the quality of your horses.