Once I a really big horse stepped on my foot when I was wearing sandals. It really hurt. That said, I got a chuckle out of the panel where this huge, evil looking horse daintily plucks the carrot out of his hand.
4:00? Yeesh, I've been getting up at around 6 for the past…well crap, nearly ten years, and I'm still not entirely used to it.
The bigger the horse is, the more docile they tend to be in my experience. That doesn't mean they can't royally mess you up of course, particularly in the case of this one abused Percheron mare I used to know who you couldn't even take out of her stall for fear of what she could do once loose. (However that had more to do with her crippling fear of humans than any ill will towards us. In the two years I knew her, I never once got a chance to even touch her. She simply wouldn't let you come close.) But I'd be more likely to trust a draft breed like the evil looking horse than, say, a more hot blooded breed like an Arabian or Thoroughbred.
I'll be amazed if Hachiken can even see straight after a month of all this vigorous activity. It'll be amusing to see how he tries to adapt.