(Oregon City, OR)  --  Clackamas County sheriff's deputies say a drug bust near Oregon City netted four arrests and revealed a number of dogs living in filthy conditions.  Authorities say more than seven-thousand dollars in cash and 100-thousand Tramadol pills were seized in yesterday's raid at a home in the 16-thousand-400 block of South Harding Road.  Deputies say more than a dozen puppies and a number of adult dogs were found living in what appeared to be a breeding area that was infested with rats and included pens containing large amounts of feces and urine.  Many of the animals have been placed with the Humane Society.