Definitely best to keep them out of the room whilst decorating, and for about 48 hours afterwards - even though the fumes don't smell as bad as they used to, they are still best not breathed in. I decorated a few weeks ago and my lot were banned for three days, and I tried to keep the window open as much as possible during that time to help the fumes to clear. Best not let them get paint on their coats, either, as some cats will try to lick it off - not good!