You put an extra period at the end of the addy.

http://www.anti-dockingalliance.co.uk/amcocker.htm

I haven't heard any real horror stories. I have heard about some dogs whacking things with their tails and getting them cut, but nothing like actually breaking the tail. I know my old rottie probably would have knocked her poor tail silly. It was always goign a mile a minute. My RB American bulldog had a tail that was constantly knocking things off the table. One time his tail hit me in the face so hard my tooth went through the skin under my lip. I have a scar there now.