Jill, I've never had a dog chase me beyond their own property lines. Some think they are being protectors and see us riding by as intruders.They will bare their teeth, snarl, growl and be very menacing. Mostly, though, they won't bite. Still, don't take unnecessary chances. All the suggestions above are good. I usually talk to the dogs in a friendly stern way --+*&^%$#@!-- with NO fear in the voice as I pick up the pace and get out of their range. I've never been bitten. Don't be intimidated by them.