I brought Sophie home at the end of March, and brought Daisy home at the end of August. It was an adjustment at first, in that you have to start all over with the potty training and crate training. But it was easier this time around
They are such great playmates that I have never regretted getting a second. The only con, IMO, is that I don't take them with me as often as I did when there was only one. 2 is harder to handle.