I can put it in the chamber of either my .308 or .223 and actually see the red dot at 100 yards using the high magnification on my scope. The "dot" is more like a "dim splotch" but it allows me to not only get on paper, but within 3" or so every time.
One note however, I do my bore sighting early in the day before bright sun hits the range .
As for my cat? A 20# Maine Coon that doesn't get excited over anything other than the sound of food being poured in it's dish or the rattling of a bag of treats