@Christine Swaidan,Check with your attorney about whether you can ask for verification of the second dog as a service animal.That said, it is possible that one dog was trained to help, for example, a limited vision person operate "independently" (trained to focus on the person's surroundings and alert on perceived dangers) while other dog is trained specifically for either emotional support or for some other condition like detecting when the person is in danger of falling into diabetic coma or some kind of seizure (trained to focus on the person and their behavior without being distracted by the person's surroundings).My $0.02...David J Dachtera

These eviction services are no substitute for good old fashioned detective work.

alarms, fire detection, fire surpression, moisture detection and other home automation systems are all things you should check on for discounts for your rentals and residential properties. 

As a former FL narcotics detective, having a lot of drug activity without violence can still be bad for your business.

She basically admitted that she would clear out whenever a visit (maintenance or a case worker was coming) to avoid being detected. 

Government operates the same way.The maliciously bad landlords (criminals, for all intents and purposes) will ignore the law, figure out how to fudge the paperwork, or avoid detection so it won't do anything to prevent a fire or accident or injury in their properties because the city doesn't have the manpower to go out and enforce it without a complaint.But hey, in the meantime it'll make nanny state bureaucrats feel like they're doing good deeds and fill the city's coffers off the backs of the good landlords at little or no cost to the city, so of course they'll figure out how to push this thing through.

You don't want to inspect so often that they can say you're harassing them or affecting their quiet enjoyment, but you might be able to detect something going on.Funny story: We knew we had a tenant with a rabbit (no pets policy), because the owner hauled trash away on weekends because we didn't have city pickup on weekends. 

It is conceivable that he has got a real job although the detective we spoke with did not think that was very likely.

You may want to look at 21 OS 446 which makes it a felony to "conceal, harbor, or shelter from detection any alien in any place within the State of Oklahoma". 

Sue has some great techniques to help detect/deter renting to illegal immigrants.