Nothing is more obsessive than a West Highland Terrier on a "mousie" mission.
Meet Heather. From the moment she's let out the backdoor in the morning to pee until we drag her in the house at night, she's hunting squirrels and chipmunks and the occasional mole.
I believe the squirrels deliberately hang in the pine tree to torture her, to give her a crook in her neck. She can stare up for hours. Hours, if we let her. Or if a mousie doesn't come down somewhere else into the yard.
Once in awhile, she'll take a break. This is Heather, post catching a mousie tail. You can't see it, cause she's laying on top of it.
Makes my obsession with beads look very unproblematic. :)