A dozen horses is usually called a 'string' of horses.
No, there is no definite cure. In some cases muscle relaxants, anticonvulsants or other drugs that affect the nervous system may provide some relief. There is also a surgical procedure that may provide some relief, but the the results are variable.
If it is more than a string, it would be more than 3 horses.
a string of polo ponies is the 7 horses that a polo player plays on during a game.
a herd Horses (General) Team, Harras, Stable, Troop, Stud (a group belonging to one owner) Horses (Colts) Rag, Rake Horses (Ponies) String Horses (Wild) Herd
The Pony Express
Cowboys loved a colorful phrase! This is a descriptive term for a line of horses. They would typically be tied together with a rope, which cowboys exaggerated to be a string.
Halt!
There are so many nouns for horses like Haras, stud, herd, string, field, mews, mob, parcel, rag, slate, set, team, stable.
It is a harras, rag, heard, string, team (working) or field (racing) of horses
The plural form of halt is halts.
Halt chose Will as his apprentice.