Yes, although it always depends on the temper, and such, of the animals. So not all llamas will graze with horses and vice versa.
Yes.
Yes, donkeys often graze with horses.
Llamas are different to horses because llamas have thick coats of fur, while horses only have a main on their neck. Llamas spit up to 10 feet, while horses do not spit at all. There are shoes for horses, but not for llamas. They are completely different to horses. Llamas are much more closely related to camels than horses, sharing the Family group of Camelidae
No.
yes, it is possible but it also depends on if they have been properly introduced and they get along together.
Horses eat grass, they graze.
Anywhere there is food
The poem Horses Graze is making the point that when horses graze, they aren't thinking about or worrying about what anyone else is doing. They just mind their own business and enjoy the grazing. This is part of their secret of remaining happy.
Horses get their food in the same way, no matter their color or breed. Wild horses graze and domestic horses graze and wait at the feed trough. Color is irrelevant to horses and their stomachs.
Horses graze. To "hunt" food actually means to find their prey, stalk/chase and kill it. Horses don't "hunt."
Sheep
Llamas are definitely not house pets. Llamas need to be outdoors where they can graze and hopefully guard other types of livestock you may have. They are very interesting and curious animals who grow to a pretty large size in many cases.