A McCracken County Animal Shelter employee found five dogs dead at the facility at 6:45 a.m. Monday, and the cause of death was still unknown late Tuesday.
The dogs were taken to Breathitt Veterinary Center in Hopkinsville for a necropsy, said Ryan Brown, the shelter director.
Earlier this month several puppies at the shelter were found to have the parvovirus, but Brown said he didn't think that was the cause of the five dogs' deaths because the five were mature and parvo usually strikes younger dogs.
The McCracken County Sheriff's Department and state police await the test results before making decisions about an investigation.
Dr. Loran Wagoner, an inspector with the Kentucky Board of Veterinary Examiners, visited the shelter two weeks ago in response to a complaint brought to the board in May. His report has not been made public, but Brown said Wagoner had mostly positive things to say about the shelter during the visit and saw no need for corrective measures. Wagoner also said the shelter was among the top 20 percent of shelters he had seen in the state in regard to cleanliness, according to Brown.