I can't say how Ami responds when inside because he can't see anyone from inside (when he's in and in the room that has windows to the street, it's dark and usually between 10:30 and 2 AM.)
But I can speak to when he is outside contained with the invisible fence - he races along the fence line, parallel to the road, in full attention. He never barks, once in a blue moon will give a brief "woo - woo".
Now - when Archer arrives, it is a conflagration. Wooing, scrambling, bouncing, leaping, no holds barred - it is a joy to watch!
I will note that before my son got Archer and before Ami was allowed to run, first in the backyard and then on 4 ish acres with the invisible fence, on our walks, if we saw another dog (or person, for that matter) he whine, fuss and get all hyper. Now that he is getting lots of play with another dog and is allowed to roam free on the property, this no longer happens. When Archer is not here, it takes 2 days to recuperate and he sleeps - I have a lovely, apricot fur rug:lol!: