when i was little my dad and i were on a ride and a big dog came out and tried to attack us and we we're trying to get outta dodge and the dog got my dad's back wheel, popped the tire, and pulled the tire off the rim. i don't remember what happened after that because i was hauling butt home. he said he got of the bike with the bike between him and the dog and swung it at him and shouted and the dog left.