There are a few ideas around on how to treat fillies and mares in season.

关于如何对待发情期的小母马和母马有几种观点。

He kept 20 mares for breeding.

他养了二十匹母马，用来繁殖仔马。

He kept 20 mares for breeding.

他养了二十头母驴用来繁殖。

About 250 of these mares are bred to Magnum.

关于250的这匹母马繁殖万能。

I moved to my own house and land, taking my two mares with me.

我搬进了我自己的房子和地，带着两匹母马。