I know what you mean about the "thinking they're big and fierce," I have a pug that's small and she thinks she's a hot shot, all tough and bad compared to my yellow lab that's a darling, hardly ever barks.
OMG that is the cutest thing ever! If I tried to put my Maggie puppy in a bag, she would just eat it - she eats EVERYTHING! My house is a shell of its' former self since we got her and I had to put away/throw out everything she's ripped apart.
I always have to hang up my duffle. If I leave it on the ground, Finn (the one on the right) will burrow in it! He's never (knock on wood!!!!!) chewed any of my bags - just likes to sleep in them! The boy's got expensive taste!