Nice to hear you had your dog treated, some would let their animal suffer.
The bigger than normal 'Yellow Jacket' looking critters may actually be (no pun intended) the European Hornet that is active at night and attracted by light.
It is said they will sting and I for one will leave well enough alone and heed the warning. However, I have been known to be doubted so for my distrusting fan club, have-at-r and feel free to grab a live specimen. Do let us know how you make out.. 10-4?
Speaking of Bees, anyone bothered by those buzzing huge black and yellow wood boring bees? I have two remedies (actually I have 3) guaranteed to work. (1). Bee traps do work. (pictures upon request) 2. "Bumble Bee Badminton". Now that's fun, I don't care who yinz are.
Just stand real still, with your favorite racket in hand. When them ugly suckers come buzzing in, and hover in your face..... WHACK-O
Disclaimer: Not responsible for smacking family or friends upside their head or removal of bee, or parts thereof, stuck in webbing.