Elissa it would be upsetting for Archie at first but they are trained to look after them when they are. Alex was fine his first day, cried becuase we took his trains home the second time and this week he hugged me and then cried but after a little while he was fine.
You can always call the centre and check on him and it might do him the world of good.
Alex has never spent much time away from me and if he is with someone else it's always been DH.