starrynightxxi
Fish Herder
this may be off topic at this point but quarter horses are most definately not a simple cross between a thoroughbred and an arab. they came about through the selective breeding of ranch horses (which were often mustangs) and some lighter bodied horses which were, or were very like thoroughbreds.
The only times i can think of arab influencing the quarter horse line (except where the breeds are purposely bred) would be the introduction of arab lines to spanish lines (Andalusia. this is why Spanish Mustangs show both spanish as well as arabian type), and the accidental or purposeful introduction of arab lines to mustang lines through release/escape. People often would kill wild stallions and release finer boned or draft horses to influence the mustang lines, as well as simply releasin animals that are too old to work anymore. That's why they're so varied.
but that's enough off topic-ness
The only times i can think of arab influencing the quarter horse line (except where the breeds are purposely bred) would be the introduction of arab lines to spanish lines (Andalusia. this is why Spanish Mustangs show both spanish as well as arabian type), and the accidental or purposeful introduction of arab lines to mustang lines through release/escape. People often would kill wild stallions and release finer boned or draft horses to influence the mustang lines, as well as simply releasin animals that are too old to work anymore. That's why they're so varied.
but that's enough off topic-ness