A horse should have free-choice grass or good quality grass hay 24/7, because horses need to be constantly eating forage due to how their digestive system is.
If they are free grazing then yes. If they are a race horse or sport horse...you may wish to mix with grains.
It really depends. If you give a horse grain in the winter then yes you should in the summer but just less then you do in winter.
Besides a seahorse, a horse that has foundered on grass must be kept away from grass. Green, lush grass could kill an already foundered horse. (ponies are at greater risk)
a fondered horse is a horse that has eaten to much grass and or food and is fondered.
Hay
You could sift your horse to a nearby area with dirt and shift your horse daily to a grassed area for 1 and a half hours and then back to the dirt area. Then it minimises the chance of your grassed area dying it and will reduce the killed grass. Also fertilise your grass daily and put horse manure on the affected areas.
it eats grass or humans give it to them
Well, Horses in the wild eat grass so sometimes it would be good to let them have a nice graze everyday. Horses can also eat vegetables, fruits, and oats for snacks. You can give them grains and horse feed. The best stuff to feed a horse is "Dr. Green"
If you are riding him, you should make him walk on. To do this, just give your horse a little kick, pull the reins up, or steer him into another direction. If you are walking next to your horse,(like leading him to a pasture, etc) its best not to let them eat grass. If your horse does so, pull him away from the grass. Its another thing if you are grazing him. If you are, you can let him eat grass.
Talk to it every day and never forget to feed it. If possible, try to plant grass outside the barn and let the horse out everyday to graze (don't forget to let it back in at night!). Buy the brush from Blue Sky Ranch and brush the horse everyday.
no it will make them very ill and they may die
the horses like the human they need water to drink it or they will die if they did not drink water everyday
It really depends. If you give a horse grain in the winter then yes you should in the summer but just less then you do in winter.
Mammal + Grass = Horse
Besides a seahorse, a horse that has foundered on grass must be kept away from grass. Green, lush grass could kill an already foundered horse. (ponies are at greater risk)
You did something the ultimately wasted your time. If you planted a field of grass, because you wanted to feed your horse, but your horse died, then you would have wasted your time with the grass. Because the horse is dead, you will have no need for the grass.
Removing the horse from the offending grass will rectify grass allergies. Ask your veterinarian, but hay is a substitute that usually won't bother a horse with this problem.
I've personally never heard the term 'to grass a horse'. However the term to 'putting a horse out to grass' or 'the horse is on grass' are widely used in the UK. I would assume therefore that it would be the same thing as those terms. A horse at grass means it is eating pasture grass and may or may not be supplemented with hay or hard feeds.