(Corbett, OR)  --  A Corbett homeowner likely won't face charges for killing two cougars on his property.  Multnomah County deputies say the man shot the big cats earlier this week when he discovered them trying to get into his chicken coop.  Authorities say the unidentified man fired warning shots beforehand, which were reportedly ignored by the cougars.  A spokeswoman with state fish and wildlife told The Oregonian that it's legal to kill cougars that are threatening property.  Also, it's cougar hunting season, and the homeowner has a hunting tag for the animals.