All under 25 pounds and certain breeds restricted.But our biggest change is in the lease:we let them know that for any animal (note: not pet) the assumption will be 1) the unit is returned to a state where a person allergic to the animal would be able to rent the apartment and 2) a professional cleaning will be conducted at the landlords discretion and the tenants expense, up to and including wall wash, hi powered vacumn for dander, enzyme treatment, killz etc. 3) The expense will be taken out of the security deposit.We haven't had it tested in a dispute yet, but I think it keeps good pet owners careful, rather than prevents bad apples, but it also gives you the ability to do a very thorough job, which should work with most pet damage, horror stories aside.

Or you can use a neutralizing enzyme made specifically for cat odors (search online or ask your vet).

I have ripped out all of the laminate, as that was the worst treated it is enzymes, vinegar and water scrub, then sealed with BIN primer.

@Justin Jacques  It may be too deep to help, but there are several urine removing enzymes sold at pet stores by the gallon for about $25.

Chlorine constantly escapes through the plastic walls of its containers. (4) The ionic structure of bleach prevents Chlorine from penetrating into porous materials such as drywall and wood---it just stays on the outside surface, whereas mold has enzyme roots growing inside the porous construction materials---however, the water content penetrates and actually FEEDS the mold---this is why a few days later you will notice darker, more concentrated mold growing (faster) on the bleached area

I have had luck with technicians that use enzyme cleaners.

Ive looked into enzyme cleaners, and other chemicals, but havent found anything suitable for floors. 

Floor guy says we can spray an enzyme solution and let is soak for a week, then cover with hardi and tile...

Wondering what people think of employing a service in which someone visits the rental property once a quarter with a UV flashlight and some pet urine odor destroying enzyme.

PetCo or PetSmart sells a product call "Simple Solution" that is an enzyme that "eats" the dog pee.