A question which comes up far too often, which you're to interpret as "Are you willing to break all of health-Canada's rules to accommodate my pet..."
The answer is always, unequivocally "NO". We hear it all - "Emotional Support Animals" and "But she/he's so cute/well behaved/gentle/etc, etc."
I imagine asking them if they'd mind my waiving the rule that requires me to wash my hands after shitting. Why not? Rules are made to be broken. Or the rules around storing and preparing food? Leave that fish out on the counter for a day or so - we'll feed it to our rule-breaking customers.
Rules are rules. Pets, like children, are rarely as they're described, and the law forbids having them in the restaurant or on the patio. The only exceptions are recognized "Service" Dogs, which have an orange vest to identify them. We do concede they can dine on the beach with their pet - we have picnic tables, and if not too busy we'll serve down there - but ....
The dog, it's a foot in the door - a way of getting people to break one rule so you can break a few more, rules regarding good manners, tipping, etc, etc. You give in to them on this one small thing and always you'll regret it - the "Are you dog friendly?" is a flag for someone you most certainly don't want to serve, it's the tip of the iceberg for someone who is most probably a celiac, needs honey and soya or almond milk with their caffeine-free tea, the list goes on and on....