Maximus, our 11 month 150 lb English Mastiff has taken a liken to Winter Boots! We have had no problem with the furnature, chair legs, table legs, coffee table, Shoes or clothes, he never chewed anything..... i was begining to think i was blessed. Then about a month ago he took a liking to my new Baffin -100 extreme winter boots ($250), they lasted 2 weeks then i found teeth marks all across the foot part of the boot, big holes chewed in them!, I scolded him, shook the boot at him, called him a bad dog for chewing my boot. I went out and bought him more rubber chew toys, tires, squeeky toys etc. The next week i found my son's boots with teeth marks in them. We started putting our boots downstairs. lo and behold, someone forgot to throw their boots downstairs and we came home to chewed boots again. GRRRRRR, big holes chewed through the rubber foot part! We took his cage out as we thought he was good to have the run of the house, obviously not! We haven't caught him in the act but i need some advice to get him out of this very expensive taste for boots!