YES - A horse can lie down with Stablemaid

   YES - Horses are unable to get their legs caught
       in Stablemaid

   YES - A horse accepts Stablemaid as readily as
       a horse rug

   YES - A mare with a foal can wear Stablemaid
       and the foal can still drink

   YES - The horse is in no discomfort wearing
       Stablemaid.   When full, all weight is evenly
       distributed and there are no pressure points