A bearing is a mass of flesh protruding from the vulva of a pregnant ewe.
Bearing retainers of this type, for use in cases of vaginal prolapse in ewes, have been around for many years.
This support is used to help prevent prolapse before or after lambing. Once inserted into the vagina it can be tied to the fleece to retain. Or use a piece of old baling twine, to secure in place with a loop around the front legs (under neck) and back to the retainer. Even when used prior to birthing, the exit of the lamb will push the retainer clear.
Sterilise and use a lubricant before insertion. Pack of 4 supports complete with tie tapes.
The risk of bearings can be overcome by ensuring a good, but not overabundant, supply of grazing pasture. Keep at-risk ewes off hilly ground close to lambing time and encourage gentle every day exercise.