I don't know if he has gone to the bathroom or not and now that you say that I am worried about a stone..... He has had one in the past. I think he ate earlier tonight but hasn't eaten since but it is hard to tell because he is 1 of 4 cats and they all eat together. Wish I could help you more, but that is all I know. Should I take him in right away like my gut is telling me to??? Is there anything I can do NOW that will ease him???