As of March 1, the use of choke, chain, and prong collars for dogs is completely prohibited in Toronto, with fines of up to $100,000. This bylaw amendment took basically every organization that works with dogs by surprise, as well as thousands of Toronto dog owners.
It was originally only meant to be for tethering, since these collars are a strangling hazard for unattended dogs, but "noted animal lover" Councillor Glenn De Baeremaeker (of Scarborough Subway fame) personally managed to get it upgraded to a full ban as a member of the Licensing and Standards Committee. It has since emerged that he repeatedly ignored staff recommendations in MLS reports and straight up lied to council on multiple occasions to get his motion passed.
https://www.dropbox.com/s/kqbnebm1u1bu61v/Toronto Ban Dropbox.pdf
A couple weeks after the new bylaw went into effect, organizations for blind people started sending scathing letters to the city.
Guide Dog Users of Canada says almost every guide dog training group in the country uses collars that are now banned, so their trainers, handlers, and clients in Toronto are in violation of the bylaw. De Baeremaeker just put forward a motion on the city council agenda for March 28 to reopen the item and send it back to MLS for evaluation of a possible exemption for service animals. He already had to add an exemption for Toronto Police Service because they train with and use banned collars.