A 2008 "Dog Law Restricted Account" by the State of Pennsylvania is now effecting positive change for dogs in that State; it's said that this recent law is one of the strictest dog breeding laws in the nation.
"The law increases minimum cage sizes, requires veterinary care and exercise periods, and bans wire flooring...," according to today's New York Times article 2008 Law Leading to Crackdown on Pennsylvania Puppy Mills (please read for more details and to download a PDF copy of this dog breeding law).
Perhaps this is a law we could see other states adopt and enforce. I'll look for a copy of Michigan's dog breeding law (if there is one) and will post it or a link to it in the near future.
That the Professional Dog Breeders Advisory Council has decided to sue Pennsylvania for violating the federal Constitution just highlights the fact that they care nothing about the welfare of dogs and everything about making $$$ regardless of abuses they engage in. Really sad.
This is not to say that all dog breeders are "bad," but rather that there needs to be strictly enforced regulation and accountability for those that deal in propagating animal life.