Horse's Weight

[Esmee819]

So when I bought my first horse she was called thin. So i didn't train her until she came to moderate. That day I trained her just to increase stamina and the next day she was moderatly thin. Is there something I could do to stop that or something?

[SeinaMacabre]

In future horses weight will be controlable by feeding him. Currently this feature is unavailable.
Only thing you can do is give a horse few weeks off to regain weight.