"The fog comes in on little cat feet..."
Has 'boîte de chat', but disdains use except in emergency. Besides, came configured for indoor/outdoor use ... either looks at door until you open it, or grabs you by the hand and walks you to door.
Cat has yet to bark, probably because barking is sooooo undignified.
Short haired, so it doesn't seem to have been a problem ... yet ... besides indoor/outdoor, is also self cleaning model.
Hell, I never even liked cats ... except this one.