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.
A very large stink, not to mention a mess.
If You mean the horse with the feathers, i think you mean a Shire horse.
Horse stomp there feet when they get tried. This does not mean that your horse is mad at you.
what does dour mean in horse racinhg
I think it is impossible. because no one will return you mobile.
It is Spanish for horse
what does no lights horse drawn carriage mean
Nothing, if you are a horse, you are
Have a look at a horse
A sire is the father of a horse.
'Horse' doesn't mean anything in Gaelic; it's an English word.
The horse has given birth to a baby horse called a foal.