Sheep/Goat Restrainer Gambrel. The Gambrel restrainer is the ideal way to simply and humanely restrain any sheep or goat. Useful for hoof trimming, general exam, or lambing. To apply, hold the sheep/goat on its side and hook the restrainer onto one front leg. Pull the restrainer over the nape of the neck and hook the other leg. The cord is then slipped under the neck. Dimension is width overall. 9" or 225mm