I have five 15 week old kittens, plus two adult cats. The two adult cats stay outside for the most part, but tend to stay in our yard and stay out of trouble. However, the one time I let the kittens outside, they all ran off for days, and got into our neighbours yard and decided to snack on some birds they had in their yard. But they wreak havoc inside the house, so I need to find a way that I can keep them outside, yet not have them become nuisances to our neighbours. I ordered one of those in ground fences last week, but had one fellow cat lover tell me that she didn't think they worked. Does anyone on here use one? If so, does it work well. If not, let me know of some other way I can contain these wild kitties. Thank you in advance for any help you could give me!