Just because 8 shots were fired doesn't mean they shot the Pug 8 times. Maybe the bathtub moved and needed shooting.
(IOW, they missed several times.)
I was thinking that too. Furthermore, unless they are firing .177 pellets out of those firearms, no projectile will be found in a pug's body. So not only is her dog ruthlessly slaughtered before her, the bathroom is also shot-up. Every time she uses that room, she will sit down and remember this day, as she sees the holes in the floor, the wall, the ceiling, the bathtub. She gets to re-live each and every shot of her animal companion.
At least they didn't taze her to "calm" her from the hysteria.
I wonder how many rounds left the bathroom and entered into someone else's property. Bathrooms aren't constructed in the same way as your local indoor shooting range.