SHERIDAN — Owners are left heartbroken after a litter of puppies exposed to a rabies-positive puppy during a Sheridan adoption event last month were told to surrender their dogs to be put down. The Colorado Department of Public Health and Environment (CDPHE) is contacting the people fostering the puppies about surrendering the 11 puppies for animal euthanasia. The action is being taken after a puppy adopted from Moms and Mutts Colorado (MAMCO) Rescue for Pregnant and Nursing Dogs tested positive for the virus on Wednesday.