I picked up some 2 week old keets this past Sunday. They were all fine until yesterday morning I noticed one is lethargic, sleeping all the time. The keet eats, and drinks and if it is startled will run, but it is just plain sleepy. I put it with another keet (for company and warmth) in a separate area so the others would not push around but it is not improving. All my other keets are just fine. Any advise?