I realise that it must be more complicated than that. Probably some communication going on between federal and municipal authorities around how essential rodent and pigeon control really is in urban areas and exemptions are granted. Perhaps reluctantly, who knows? I mean, look at the situation over the past year with various police chiefs and others popping up on both sides of the pistol ban proposal. Tory is all about that, and our local idiot mayor Kennedy Stewart (who the heck gives their baby the first name 'Kennedy' and why didn't he go with 'Ken' from early years?), besides completely abandoning his solemn election promise of over 40,000 new below market housing units to be made available during his term in office, wasted little time jumping on board. Municipal governments and city hall departments are a mixed bag, with some decent folk who can actually think for themselves and others (politicians) who just can't.
One personal example; more than 20 years ago I was asked by a landlord to get full liability coverage for my upstairs suite, as I was seeing musicians in my workshop regularly and they were concerned about potential for lawsuits should someone fall down stairs or suchlike. Before I could get insurance I needed a business license, so I contacted city hall. Or I should say, I tried to contact city hall. A week of frustration on the phone, wasting hours leaving messages in various departments, getting the run-around any time anyone actually answered a phone and none of my voicemails replied to. Finally one woman picked up the phone in the licensing department and was very brief but polite about it. She'd heard a couple of my messages and said "You didn't call us. I never talked to you. Please do not call again." I tried to interject, to ask for some explanation, as I really wanted to have a legit business license for working at home. She repeated those words exactly, then said "Thank you, and good day." I sat down and thought about it a little and realised that she was going out of her way to help me, to offer a kindness. Essentially, between the lines, she was saying 'there is no way you are going to get licensed to work at home and if you persist an officer will have to come to your home and issue a cease and desist order' or something along those lines. She knew perfectly well that thousands upon thousands of self-employed people work at home, but that doing so at least in some lines of work was in violation of bylaws regarding use of property. So she told me to shut up and get on with my life. I did some fancy talking with the insurer, the same company my landlord was using for their fire and other insurance, and they relented and 'allowed' me to pay $600/year for the first year with $2,000,000 liability coverage against 3rd party injuries. The next year they doubled to $1,200, and I paid that. The third year they doubled it again... and I cancelled, without telling the landlord, as I simply didn't/don't earn enough to pay that kind of money for insurance. Some months later I had to move out anyway, as the landlord lost one parent and needed to have the other move in so he could take care of her. Haven't had insurance since, as musicians are mostly poor and I don't have the inclination to charge anything close to the going store rates for my work.
Long-winded, sorry. And I know only slightly relevant to the topic in terms of bureaucracies. But it goes, I think, towards explaining why public markets and the like are able to hire airgun-using pest controllers with their silencer and night vision equipped modern airguns to patrol the properties at night and eliminate pests. I was told that this happens in all major population centres in the Lower Mainland. Surely the feds are aware of it, as it must be happening in all our cities... unless consumers are happy about finding partially nibbled foods and rodent/bird droppings for added flavour, which seems unlikely. The population health outcomes of a disease outbreak originating with such animals should be abundantly clear, especially now that we're in the midst of a pandemic from that very same sort of source, and also considering that bubonic plague is slowly migrating North as climate change makes it possible, last cited as being in Colorado I think, after being in New Mexico a decade earlier.