It's a sad thing for any dog to undergo but unfortunatly - this has been done for years - the worst part is not the vets who do it - but the 
puppy millers - if you really want to be totally mortified - then read about them 
 
 
When I first learned HOW they do it (I can't even say it - too graphic) I was in tears.  The Millers do NOT practice medicine - they inflict major pain in a horrendous way