get cats vaccinated.  For wildlife's sake.  Since cats kill 3 to 5 BILLION birds per year in the US alone,  there are a a few million wounded ones that escape but could be rabies infected,  keeping the disease pool alive and well.  The estimated 20 BILLION other animals cats kill would indicate that some of those escape,  but not without being infected.  Escape but infected is the way to also keep Taxoplasmosis gondii in the human blood pool.  An estimated 60 million Americans with the brain parasite.  A healthy immune system keeps most injury free,  but that disease has prevented sea otters from expanding into southern California (infected feces swept to sea, sitting in fresh water layer on top of sea water).  But if your immune system weakens,  you might become the "cat lady",  and the parasite tells your brain that cat urine smells good,  and you lose fear of hazards,  like diseases, physical threats.  Cats are a pox on the environment.  Period.  Keep them in the house.