Originally Posted by
DeadGrandpa
I always recommend bear spray. A 24 inch diameter fog at 20 feet is easy to put on target with short bursts and is very effective. The dog is unlikely to challenge a cyclist again, based on my experience.
However, it's unlikely you'll be invited back on that group ride.
Bear spray is overkill, and is very strong - strong enough to cause permanent damage to a dog. Better to use a dog repellent (I use HALT spray) which will deter a chasing dog long enough for you to exit stage right.