Petco-backed $997 dog cancer test venture believed to be belly-up

PetDx, the Petco-backed San Diego-based parent company of OncoK9, which makes a liquid biopsy cancer test for dogs, told veterinarians earlier this week to dispose of its samples "due to funding constraints."

PetDx, the Petco-backed San Diego-based parent company of OncoK9, which makes a liquid biopsy cancer test for dogs, told veterinarians earlier this week to dispose of its samples "due to funding cons…