Athena: Came from WAS, was identified as two years old by shelter staff. She has a propensity of chewing on anything pliable, she has only been successful in using a prong collar and a chain for walks/tng. She will chew her way out of a gentle leader, regular leash and any type of muzzle. We built a shed for her to live in because she has pretty much destroyed her house. The shed has concrete b...