A few coats of paint, some open windows and some air fresheners did their best to further reduce the odors.  

Even if they are spayed/neutered, cat's must use a litter box that is cleaned regularly or the odor can get bad. 

The credit belongs to the man who is actually in the arena, whose face in marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming…; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat.”Theodore Roosevelt (From speech titled: The Man in the Arena: Citizenship in a Republic)

It took a long time to get the odor out of the building.I would advise not allowing a rabbit at all.

Another issue seems to be the smell - very strong and toxic smelling, and I worry about the odor lingering.

If you don't plan to enforce it, then get rid of the rule.The entire house needs to be deep cleaned, then you paint with an oil-based primer to seal in the odor and nicotine.

The surrounding area was built up and then everybody started complaining of the odor.

Thanks @Theodore Freeman, @Garrett Chisolm, and @Imani Bell for the encouragement and feedback.

.), Bill Clinton (William Jefferson Blythe III), Spiro Agnew (Spiro Theodore Anagnostopolous), Ulysses S.

How is the toilet causing the odor?