Or if the pet causes undue stress to someone with health issues, but even then it's something that would have to go thru the Tribunal for it to see any real action.
Also know your rights as a tenant in Ontario... And that rights on your landlord as they usually need to be reminded.
Ontario Rental Housing TribunalAs for sites, I had a preference to viewit.ca, but nothing works as well as driving through the neighborhoods you would like to live in, the place I just moved into was found simply by driving around.
cheers, and good luck!