Don't even get me started on this topic! Too late....
About 10-15 years ago there were a couple of very vicious pit bull attacks in Denver. These dogs were generally owned by drug dealers and gang members, or just stupid owners. (I don't remember all of the details of the cases themselves.) I remember in one of the cases, the dog was short chained to a tree in the back yard, never socialized, and the kids in the neighborhood teased this dog mercilessly (throwing things at it, etc.). Well, one day the dog broke the chain and attacked a child. Big surprise.
Anyway, in it's infinite knowledge, Denver banned pit bulls outright. Apparently, making the owners responsible for their dogs wasn't an option.
There have been a few stories lately about pit bulls being "discovered" in Denver. One was definitely a fighting ring, the other was just plain abuse. The "owner" left 12 pits, most of them very young puppies, in a garage with no food or water for at least a week. Finally a neighbor broke in after hearing the dogs and "rescued" them. (The really pathetic part is that in the next room was a 50 lb. bag of dog food.)
The law says that if the dogs are claimed by their owner within 10 days and the owner doesn't have any prior complaints about animals, they can take the dogs as long as they move them out of Denver. Double edged sword - you will minimum get fined for having the dogs if you do try to claim them, and generally they don't think you would possibly have pits unless you are fighting them, so will tack on more charges, AND you have to move. No one can adopt them even if they live outside of Denver. As far as I know, all of the dogs in the above two cases, including the maybe 2 week old puppies, were put down.
I had a dog who was 1/2 pit bull. She was the most affectionate dog I have ever known - not a vicious bone in her body. Her sire apparently didn't know he was too big to be a lap dog. Every pit I have ever met has seen strangers as friends they haven't met yet. Of course, if they or their owners were threatened they would defend them. What dog wouldn't?
It is because of this and other STUPID laws that the city and county of Denver has passed that I will NEVER live within their city limits.
Sorry about the rant - this is one of those subjects that really gets me hot!