Damages include, but are not limited to, damages to floors, carpets, drapes, screens,landscaping, fencing, including odors due to the presence of pets.I have not taken any specific action on the above front but the dispute has come down to security deposit refund.

Flies and odors and rabies are next.

It is generally reasonable to require a Veterinarian's report on the animal; require the animal be spayed or neutered unless contraindicated by the Vet; must be leashed or in a carrier in hallways/stairwells/elevators or other confined spaces unless that interferes with the tasks the animal performs; handler must clean up after the animal in common areas and ensure no offensive odors emanate from their residence; animal cannot be aggressive toward others, or cause disturbance with barking or other noise that is not an element of their purpose; and tenant must update the "request for accommodation" and Vet report annually.

Pet odor can be very difficult to get rid of.

The only real challenge we faced (aside from the cat odor and fleas in the house) was the fact that the mobile home contractor we were planning to work with to renovate this property passed away unexpectedly before we were able to get started.

Just getting bids I hear a lot of the contractors grumbling. 

Quote from @Michael Limjoco: Document everything and definitely go after the Tenants.Dog odor can usually be cleaned out.

Some grumbled, but still have been content since the upgrades.

ARV should be around 100K.It needs tree trimming, carpet removal and re-flooring, serious cosmetics, and removal of heavy dog odor.

I have a BRRR property that I need to rehab and looking for any special sauce anyone has been successful with on removing smoke odors?