A bit of a spoiler that has NOTHING to do with the story and should just be removed.
Serious, smart, and practical MC letting an unusually smart and malicious horse constantly try to kill his cousin because… the author thinks it’s funny. It was idiotic and pulled you out of the story. It kicks him IN THE HEAD completely intentionally so hard he lisps for a month. This is after it attacks him a bunch. Made the whole group seem stupid. Not haha silly, just stupid.