I just went out to the kittens this morning and noticed that one was being a little lethargic. I checked him out and noticed that he was dehydrated. I have an appt with the vet at 2 for him, but I am concerned. He has had his first shots (is now 10 wks old), has not been out of the back room/garage and has had no contact with any other cats. Could it just be that he got off his food because of the heat? the other three are doing fine.