You nutter a male dog or cat, you geld a male horse. You should ask your equine vet what they prefer to do, but typically it would depend on the length of time that would pass from feeding to surgery.
You can..but once you have the bit in do not let it eat or drink ANYTHING...it could choke.
the girth to make sure the saddle is tight enough
A healthy horse should drink 35-55 liters of water a day.
There is no specific number of times. When near water, a horse will drink whenever it is thirsty.
Add some of that nice tasting and smelling powder that you can buy in all good tack shops
If this isn't for any games, in real life, horses will drink when they get thirsty enough. there's a saying- you can lead a horse to water but you can't make it drink
Water
Not usually.
Ayrag also spelled Airag, is fermented horse milk which is the drink of choice among the mongolians
Have the rider get off the horse immediately and try getting a more experienced rider to train the horse, or turn out the horse before riding to get that energy out. or more training with you to get the basics.
...you can't make him drink. But they WILL drink if THEY lead YOU to water.
water- from a river