But I already have a water bottle, and don't normally carry a tennis ball. Additionally, if the dog likes to chase tennis balls, it teaches the dog that cyclists may bring tennis balls for them, and will throw them when they chase the cyclist. The next cyclist probably won't have a tennis ball.
__________________
I stop for people / whose right of way I honor / but not for no one.
Originally Posted by
bragi 
"However, it's never a good idea to overgeneralize."