Well we always bring our horses to the water trough and pick the water up to the horses mouth, and most of the time after that they all just come and drink from the trough. Hope that helps =)
No, it's done all the time. How else are you going to water a horse, pack water from the taps in the house? Don't be ridiculous, of course not! A garden hose used to put water in the trough is the best thing for your horse. Quite frankly, your horse doesn't care if it's "unsanitary" or not, just as long as the water is clean and fresh it will be happy.
A horse should have a water trough in his paddock or stable so he can drink from that whenever he needs to. Horses should regularly be offered water if you are out on a trail ride, at a competition, etc, but they shouldn't need water constanly. If you are worried, see your Vet.
trough
Horses drink water, although some horses won't drink water when they are traveling because it tastes different than they are used to so people put Kool Aid of Gatoraid in the water to make it taste good.
A trough, or a drinking trough.
A horse trough is usually a box or cage to put hay or grain in. Sometimes it is a tub of water in the pasture.
A bucket, a trough, a big water tub, a creek..... Mine can drink out of a bottle.
...you can't make him drink. But they WILL drink if THEY lead YOU to water.
Water
water- from a river
they live in water so they drink water
A healthy horse should drink 35-55 liters of water a day.