What are his body signs? Is his ears laid back, or pricked forward? Does he appear tense or relaxed? Is the only horse you have? Did you call out to him before you entered the pasture or not? Did you have a feed bucket or hay bale on you at all? And, how long have you had him? It's most likely that he's just happy to see you and is running up to greet you, or thinks/sees you have a treat for him that he is super-eager to get from you.
If he's happy to see you, his ears will be pricked up and not laid back, he will not show the whites of his eyes like he's scared or challenging you (unless he's an appaloosa, which they always show the whites of their eyes no matter what mood their in), or appear tense. If his ears are laid back, he could either be in a bad mood, afraid of you, or scared you might hurt him and have learned to strike first. But, if he's a good nature horse (which I'm sure he is), then he'll just either be eager to get that yummy thing in your hand to eat, or he's just really happy to see you.
A horse pasture should have enough space to graze as well as space to run. One horse is 1.5 AUs, so depending on your locality, pasture quality, time of year, etc., you could pasture one horse per 2 acres or more per month.
between 100 to 900 dollars a month. a good price at a decent farm would be 400-500
the black thouroughbred in my pasture
In a stable in the countryside?
A horse in a good pasture will do.
This is the way horses are: your horse is the "new kid", the lowest in the pasture's pecking order. The gender make up of the pasture has an effect too, as does the gender of your horse; but they will all eventually work it out, it's a natural part of their world and they know how to handle it.
This can depend on the breed of horse and type of work the horse is being used for. Example, is the horse kept for training and competition or is the horse for hacking/riding for pleasure. Stable vs pasture can also depend on the time of year -winter vs summer and of course the quality of the pasture- is there shelter and food.
Yes and no. Yes for if it cribs alot and if its in a small pasture. No for if its in a big pasture and if it doesn't crib alot.
Yes
It can help so long as the horse doesn't have what's called 'pasture heaves' where it's allergic to the molds in the grass.
No. Pasture the horse on untreated grass. No treatment of any kind, except cutting the grass with a lawn mower.
It is good for a horse to have another horse due to swatting the flies, and just for the company in the pasture.