My horses are in poor shape

[Quarterhorsebabe]

i havnt worked them in three game days and they gotten from moderate to poor for their weight what do i do?

[Tom]

Feeding isn't finished yet. Soon you will be able to change what your horse is eating.

[Luka Megurine]

Same is happening to my horse, Anon. I haven't worked her at all and she's so far the only one getting worse. The others are okay going between moderately thin and moderately fleshy.