I grew up in Washington state. My grandmother had a pet cougar aka mountain lion she raised since it was a cub. She kept in a huge cage under the front porch stairs when it wasn't in the house. She'd open the cage after dark and in the morning it would come back. Never had a problem. After a few years, one day, it never came back.
"The man who survived said he had his entire head in the cougar's mouth, but his friend ran away and the animal chased him, officials told KOMO."
Never run
