[livingdustmops]

Here are a number of articles for people to read. The first thread does show a puppy being cropped:

Should You Crop and/or Dock Your Dog?

BBC - Scotland Outdoors Articles - Views on tail docking

Dr. Walt's happy tails: Should you dock your dog's tail? - Pets - Life - Canadian Living

Docking a dog's tail

Docking & Cropping In Dogs

A history of dog tail docking - by Janet Farricelli - Helium

Dogs with docked tails can grow up mean: study

I have not been able to find much documentation on dogs with broken tails (statistic's) but will continue to look..