What? The question was *WHY* landlords ban pets. I have with two dogs, they can be pretty disgusting creatures sometimes, that's a fact I'm keenly aware of. I plan to pay off my mortgage, sell my house, and buy a bigger house. I know before I can sell it I'm going to have to *at least* replace all of the carpeting, repaint all of the walls, replace all of the faux hardwood flooring, and deep clean every nook and cranny. If I do this all myself it won't be too bad, but if I have to pay someone to do this, it's likely going to be very expensive. And let's be real, most landlords aren't going to do all the work themselves.
That is the biggest reason *WHY* it's banned. But dogs, especially big dogs, can be a liability as well if they end up attacking someone on the landlords property. I believe it would be more logical to just charge a, per pet, pet fee every month. But I'm not a landlord nor to I plan to be one any time soon.