In my tiny kiosk, I regularly get customers with guide dogs, they are more than welcome.
Other small, well behaved dogs are equally welcomed if the owner asks me.
What REALLY hacks me off is when people just assume that their horrible hound can just come in uninvited.
Then the thing bounds around excitedly, knocking things over, jumping up at me and trying to lick my hand or face.
''Oh don't worry, our little tiddles is just being playful''
To me, our little tiddles is a disease ridden menace, and I would willingly pay the bill to have it put humanely to sleep.