The Perendale originated in New Zealand from crossing the Border Cheviot with the Romney breed. They are an open-faced, medium-framed breed that produces bright, lofty, long-stapled, medium-wool fleeces. Developed as an easy-care sheep, they are both hardy and highly adapted to marginal forage-producing areas.
It depends how badly the eardrum is ruptured. Mine ruptured a couple of years ago from a bad ear infection, and it took me at least 3 weeks to get the ringing out of my ear. Depends a bit of how good you protect the ear from pressure changes; usually between 2 - 4 weeks. If you really do have an ear problem, do NOT mess 'round.
Causes of Eardrum Perforation. The causes of perforated eardrum are usually from trauma or infection. A perforated eardrum can occur: 1  If the ear is struck squarely with an open hand. 2  With a skull fracture. 3  After a sudden explosion. 4  If an object (such as a bobby pin, Q-tip, or stick) is pushed too far into the ear canal.