On Friday afternoon, Animal Control officers served a "warrant for care" on a 32-foot trailer parked in the 4600 block of 43rd Avenue Southeast in an unincorporated area of Snohomish County.
When the officers opened the door, they were shocked to see more than 100 cats and kittens inside the Airstream.
"Even the most experienced officers on site were astounded by the large number of animals contained in the trailer and the filthy conditions in which the cats and kittens were living," Snohomish County License & Animal Control Services Manager Vicki Lubrin said in a news release.
The cats didn't have food or water and showed "significant signs of illness," according to Lubrin. The conditions were so deplorable and unsanitary that officers were forced to use ventilators and protective suits to enter the trailer and remove the cats.
Blood tests later confirmed the cats were diseased and contagious, so all 110 were euthanized, Lubrin said in the news release.
Officers had been aware of the owner and his animal hoarding, and he had been told to improve the sanitation and containment conditions. Animal Control says the man moved the trailer several times, and officers finally found it again last week in Ebey Island.
The owner wasn't arrested, but the case has been forwarded to the Snohomish County Prosecutor's Office for review of possible animal cruelty charges.