Hi SouthernHoney. I believe the safest and best thing to do, in today's world; is to keep cats safely indoors or allow them outside within the confines of a wire mesh (2x4" or "chicken wire, etc.) 'cattery.' My cats are all rescues and have seen enough of the damage done in the mean streets. There are so many things which can happen; traffic, cruelty, becoming 'lost,' stolen, predators, dog attacks, mean kids, etc. So, we build large outdoor enclosures (we are lucky that we have the room to do this) which are completely enclosed w/shade cloth or woven wire tops and doors which connect directly to the house or which allow access from the outside in. this way; your kitties are able to feel fresh air, bask in the sun a little (we use shade cloth to prevent tender pale nose/ear cancers) and view nature up close. It's the next best thing to the total outdoor experience and serves to keep your cat(s) safe while satisfying their need to experience a bit of the outside world. Thanks for asking this question.