Well, if the horses escape the remaining enemy troops can just catch them and use them again. They're not that useful to bear and co. either, so to be blunt it's probably better to just deprive the enemy of potential advantages than take pity on the enemy's mounts. Honestly, the most useful thing the horses could do for bear and co. is get killed and eaten anyway.
They sure have no qualms about killing people. Keep killing those soldiers, who follow orders to their lordship, but keep you word to that bastard, that just steals everything he wants, so that guy can send more people into their death.
@Qelix I mean, it's kill or be killed right now. Kumakichi is dealing with the consequence of leaving that fat bastard alive, so he'll probably finish him off this time.
... Those colour pages.
No matter how you look at it.... the okamimimi look fake. Logically, the fur on the ears should be the same colour as the hair on the head... or at least transition smoothly. It doesn't though. Not for any of them.