By Ross O'Keefe Heartless users on Los Angeles’ Skid Row are testing their drugs on dogs as part of horrific animal abuse in the notoriously squalid area , a nonprofit group says. “Every day we get another call, saying people are trying to sell their dog for drugs, and this dog is dying on the streets,” Joey Tuccio, a volunteer with Starts With One Today, told KTLA , saying vile abusers have tested their drugs on dogs to make sure they’re not laced with deadly fentanyl. “We try to come every Sunday and all we see are dogs being bred, dogs being abused and neglected.” The group receives frequent calls about animals in need in the area and dogs dying or being sold for drugs. A photo of a black dog rescued by the group shows the pooch with a cone around his head and a rotten leg. “We had to amputate the black dog’s leg because it was rotten to the bone,” he told The California Post of the Skid Row rescue. The group’s co-founder, Jonathan Parker, said puppies are be...