I carry muzzle mace. Not sure if it really works because I've never had to use it (thank God).

I heard once (not sure if it was on this board or not), but I heard you should carry one of those LOUD horns. Have you ever been to a hockey game or a football game and somebody has one of those LOUD air horns? I heard you can scare away a dog with one of those. But then again, you'd scare just about anything with one of those horns (myself included). I've thought about looking into getting one of those horns but I'm not sure where you buy them.