Sammy, a Shetland sheepdog, wouldn't touch his food, retreating to a corner of the yard and devouring mouthfuls of dirt _ behavioral oddities his owner later learned came from a lifetime of abuse as a "stud" in a large puppy mill.

The 10 years of caged confinement Sammy endured would have been illegal under a bill signed late Thursday by Gov. Ed Rendell. The governor, who owns two rescued golden retrievers, and other dog advocates hope the new law will help Pennsylvania shed its reputation as the puppy mill capital of the East.

The Humane Society of the United States has counted Pennsylvania among a handful of states where lucrative, largely unregulated puppy mills are concentrated.

The issue caught the attention of Oprah Winfrey after a suburban Philadelphia rescue organization put up a billboard in Chicago begging her to do a show on dog breeder abuse. The movement took on new momentum when, in August, operators of two eastern Pennsylvania kennels shot 80 dogs after being ordered to let veterinarians examine some of them.

The new law imposes strict standards on commercial kennels, including at least twice-a-year veterinary exams, larger cages and exercise requirements.

"We've catapulted ourselves into having one of the best laws in the country," said Sarah Speed, the Humane Society's Pennsylvania state director.

At least three other states have passed crackdown measures this year. New laws in Virginia and Louisiana limit the number of dogs that can be housed in kennels, and Arizona law enforcement officials were given the power to impose a $50 fine against anyone caught selling animals along public roads or in public parks in urban counties.

The new law in Pennsylvania targets about 650 large-scale commercial breeders, or roughly one-quarter of the state's 2,600 licensed kennels, that sell any dogs to dealers and pet shops or traffic in at least 60 dogs per year. Violators would be subject to both criminal and civil penalties.

The law also gives dog wardens the authority to act on alleged violations, a power previously given only to police and humane officers. Also, only veterinarians will be allowed to euthanize dogs in commercial breeding kennels. Continued...