There is a product called OdorXit AQM which I used successfully in a unit which was very badly assaulted with pet urine. 

Other common lease violations are damaging the real property, staying longer than agreed upon, keeping pets without the consent of the owner, or breaching one of the material terms of the lease agreement.Performing illegal activityInvolvement in an illegal activity may be valid ground to evict a tenant.

We don't allow pet dogs, or credit scores below 600. 

House Rules: In the event that the premises are in a building containing more than one unit, Lessee agrees to abide by any and all house rules, whether promulgated before or after the execution hereof, including, but not limited to, rules with respect to noise, odors, disposal of refuse, pets, parking, and use of common areas.7.

If pets live there, do it more often.Dryer...

She is single, no pets, just looking for a place to stay closer to her work.Just throwing the idear to the wind here.

We have a few one bedroom houses, they make for decent rentals here (in KC) but usually for either elderly folks who don't need much space or someone who has a pet (usually a dog) and wants to rent an apartment but gets turned down because they don't accept pets.

A word to the Newbies and Long Distance investors, BE CAREFUL of the advice you take, i have seen quite a few posts giving guidance from members that have read all the books, listened to all the pod casts, BUT have never purchased a property ever in their life, this is my biggest pet peeve about this site, while the exchange is great, there is No Vetting to be "Pro" just pay and your a pro, no experience needed.

Also location, floor plans, builders reputation, pet friendly or not matters as well.

The problem is that the prior owner had a number of pets, which she allowed to use the floor as a cat box.