Where do you live (you don't have to say city or anything.......just state/area....) that would help. I found this website, and a few others, but most are based in certain areas only. http://www.peoplewithpets.com/ Just search for "pet friendly rentals" and you'll find several websites.

It is very difficult (in most areas) to find a place to rent that allows pets, especially large dogs. That is why I still live at my parent's home because I can't find a place to rent that I can afford, allows pets, and has a fenced yard.

Good luck!