I've been nipped by one dog and knocked off my bike by another. So I'll spray a dog at the drop of a hat.

On the other hand, I was riding down a country road and heard the thump of doggie paws behind me and it was a dalmatian. He ran a long ways along side me. Just made me feel good.

Then there is Buddy. The terror of his neighborhood. Would like your wheel for lunch. Until, that is, you are properly introduced (I have been). Then he is your friend forever.