PETA went undercover, documented what it says is evidence of awful conditions
                                
                                
                                    (Newser) -
                                    Petco, one of the biggest pet retailers in the country, severed its relationship with a Pennsylvania small-animal dealer amid a federal investigation into conditions at the facility where it keeps thousands of hamsters, guinea pigs, rabbits, and other species. Petco said in a statement Tuesday that Holmes Chinchilla Ranch and...