Our three kittens are now just over 4 months old. Both boys have been neutured but the girl kitten is not yet big enough to be speyed. None of them have been microchipped but we will get them done before we start letting them out. Last night and this evening we have taken them all outside individually on a little harness. Out of the three only Thomas showed any interest. Noah & Tiger-lily seemed quite scared. Should we get another two harnesses and start getting them used to the outside together in a pack? We are a bit wary of letting them out when they are so small as we have quite a few big cats in the neighbourhood which our adult cat Sooty has had a number of clashes with. He is massive and always comes off worse. My sister reckons they should all be going out now and that her kittens were a lot younger when she started letting them out. What is an ideal age to start letting kittens out? Are we being cruel waiting this long?