My Chihuahua saw me blast a squirrel with a 12ga one time YEARS AGO and has been scared of all guns ever since. LOLMy dads Jack Russel does the same thing, I can flick off the well warn safety on a sub 1911 in another room and she'll start shaking. She's never heard a gunshot in her life. Lolol
The Yorkie however sleeps on my rifles if I turn around and do something for a second. I think it's a "we share this weird metal thing you obviously love more than most other things" type mentality.
I just posted some pics of my 14.5" AR in the NFA picture thread