We have an indoor cat and we'd like to be able to take him out in a harness on a leash so he can sit outside with us when we're hanging out outside but we're concerned that once he gets a flavor of what it's like to be outside that he'll try to get out when we don't want him to. We don't want to regret taking him outside with us. He's not a door diver at all now. We do realize that if we take him outside that we'll have to start using Frontline on him so he doesn't pick up ticks or flees.