Hi Charlotte I have cats and moved a few months ago with them. They're more adaptable than we give them credit for. Other than an incident with one escaping her box in the car (eek!) it went smoothly. I do appreciate that some cats are maybe more finicky than others, so if yours aren't as chilled you may want to take extra steps. I'd get their carrier/s out in your existing place a good couple of weeks before you move. Just have them in the living room or bedroom with the door/s open and a blanket or towel inside. This will avoid them getting freaked out if you appear with the carriers at the last minute. I'd also get some Feliway - either a plug in or a spray - and have that plugged in/sprayed in your existing place a couple of weeks before you move and then a couple of weeks after you move. This contains calming pheromones (like Rescue Remedy for cats!) I'd also recommend getting unpacked and settled as quickly as you can in the new place, so it will seem like "home" again for them. Once they are surrounded by familiar things, it shouldn't be stressful for them. You may even want to consider putting them in a cattery for a couple of days whilst you move and get settled. However a cattery environment might be more stressful for some cats! As for keeping them in, mine are indoor cats anyway so I can't say for certain, but I think about 2 weeks is the rule of thumb. Have a couple of litter trays ready for your move & be prepared to have them in for a couple of weeks. Good luck :-) Charlie