Answer 1:
you need a stall if you get really bad weather. If you don't, than your horse can stay in the pasture or paddock
Answer 2:
Actually, you do not need to stall the horse. Stalls aren't very good, because the ammonia from their waste and carbon dioxide gets in the lungs, and horse's get stressed in small places, because they are very clostrophobic.
However, they should have a run-in facing away from the most common direction of the wind.
You don't need to put them in the same stall. The horse in the stall is pregnant, if it is not your horse in the stall, when the foal is born you will be offered to buy it.
I think what you mean is mucking out your horses stall :) This should be really obvious - would you like to live and sleep in your waste? You should do this often, to maintain hygiene and keep your horse clean.
If a horse is in a stall all day then they need hay and water. Also you could put in a salt block.
There are many things that an owner can do to take care of a horse. The most important is to provide the horse with enough food and fresh water, the horse should have fresh water source available 24/7. A place to run with a good amount of grass and a shelter to go under to get away from the elements. Providing a dry, clean stall is also key, you will need to be sure that the horse is dewormed, vaccinated, hooves trimmed, and teeth floated on a regular basis. After that lots of love, grooming and patience! Actually, many horses do fine without a stall- better actually. So you don't need a stall. Just a pasture with a run-in shelter. Or, a stall with an attached paddock. It's not as good but it will do. And they need a companion of some sort. It doesn't even have to be a horse. Goats, cows, donkeys, and most other grazing animals are great companions for a horse.
A horses stall should be cleaned every day. A horse can get a foot illness called thrush. Standing in a wet stall can cause this.
It means there is no use in trying to prevent something from happening if it already has happened. There is no point in shutting the barn door after the horse has run away. You need to do it BEFORE the horse runs off, not after.It means don't give up so easily.
I mucked out the horse's stall.
A herd is what makes a horse feel safe and is how the species has survived all this time. They also need 4 good solid limbs and a place to run away from possible danger (so a horse won't feel safe in a stall where it is isolated and cannot run, until he learns he is OK, but it can be very stressful for the horse and can cause fatal ulcers until he does learn.)
You should clean a horse's stall once a day if your horse is in at night and goes out during the day. If this is the case you should clean your horse's stall after he goes out in the morning or before he comes in, in the afternoon. If your horse is kept in a stall 24/7 (which I do not reccomend) then clean the horse's stall at least three times a day. Once in the morning, once at noon and again at night. when cleaning your stabled horse's stall move him into a spare stall while you work so he is not in your way.
All stalls, even if a horse isn't always in it, should be cleaned as much as possible. If you are bored, pick out a stall. If your horse goes, clean the stall.
Well, it depends how much your horse is in the stall. If your horse is in there every day it should be cleaned every other day.
In a stall