Well whatever it was it cleared up on his own. I think it may have been his anal glands. He had loose stools whatever small amount he did go over the weekend. He's eating the same thing as what the breeder was using, Blue Buffalo which is supposed to be very good, so I don't think it had anything to do with his food. When I called the Vet Monday they thought it might be worms, but he was just treated for worms on the 5th. They asked that I bring in a sample, but by that afternoon he was better. Today he had a grooming appt and also had his anal sacs emptied so we should be good for awhile. Thanks for all your responses!
BTW, why is it that kids and pets seem to always get sick after doctor's hours?!