Its time to go out - ball or potty time
Or, UPS, FED EX, SCHWANS, IMPERFECT FOODS, or Some one is in the driveway - mail lady, neighbor, etc.
He's gotten use to trash pickup so sleeps through that.
For all the above his nose is pressed against a window, he's barking like mad.
If I am working in the library, doing laundry he is bored. Vacuuming he might bark and bite at the hose. He's getting better at not.
If I'm hanging laundry on the line or taking down laundry he has his ball in mouth as I often throw his ball between my steps.
As far as boxes, prepping to mail or receiving he sleeps. Its the trucks, cars & people hes interested in.
Love All Life, Thank You For Posting! :)