In my opinion, breeding should be left to GOOD PEOPLE. If an individual wants to breed animals, they better be capable of providing adequate shelter, food, etc for whatever they're breeding, and love every second of what they do.
I'm sorry if this offended anyone, but I just get so worried about this subject. D:

The people I stole my cat from (Long story) had a puppy mill in their backyard; seven male dogs, two females. The males were kept in a 6x6 foot pen, and the females were left on the porch. Whenever one of the females would go into heat, they would toss the female into the pin with the seven other males, get her knocked up, and then wait for her to birth the puppies and drive up to Miami and sell them.
The state the animals in this backyard lived in was disgusting.
Unfortunately, Florida's Animal Control is (for lack of a better term) piss-poor, and they didn't check the back yard either of the times my step mom called them.
The people have since moved, so there isn't really much we can do for those poor dogs...