those straps are called reins, if you mean the things that you steer with
food
Equisetum is called horsetail because the plant resembles the tail of a horse with its long, thin, and segmented structure. This name is derived from the Latin words "equus" meaning horse and "seta" meaning bristle or hair.
Thin skin is not treatable by medication. If the horse however is having trouble with it's skin tearing easily you should contact a equine vet immediately.
A long thin mark is called a "line."
A thin strand of metal is called a wire.
A thin streak of smoke is called a wisp.
A thin sheet of wood is called veneer.
if you have trained a horse and it is sweaty you would put a cooler on it, a thin fleece blanket
A thin candle is called a taper
Denver, Colorado is called the thin city because of it's high elevation, the air is thin.
Thin batter, no specific name : )
It is unknown what the expression, "a thin horse has long hair" actually means from the story, "The Story of Wang Li." Some believe that it has to do with being able to face adversity no matter how bad things are.