
Could be he's just fed up with the whole showing thing - and for sure, if your classes are big, this might happen. I try to relax mine when waiting to be examined rather than keeping them geed up - always remember the judge may occasionally look down the line and catch your dog in an 'ugly' pose!! Not that Bassets need any encouragement, I tend to make mine lie down when waiting. Is it possible that your feelings about showing (nerves?) are transferring down the lead, making him wish he was anywhere other than in the ring?
Perhaps laying him off for a few months (not a good time right now with the show season in full swing I realise) might freshen him up. Inject a bit of fun into his life again?
You say he's not unwell, but could there be some underlying problem going on that you've not noticed?
Shot of brandy - for you maybe, but for your dog .... no way!
ps Have you discovered whether this is just boredom, or whether he's had some trauma at a recent show? Some judges can be rather rough when going over exhibits. I know of one who wore rings, sharp rings, and managed to catch the undercarriage of a Basset and that's enough to put any exhibit off. I knew another who, with one of mine, got 2/3rd of the way past mine in the final look and suddenly stopped and grabbed a bunch of her skin halfway down her back, for reasons only known to him. Boy did I have to hang onto her after that, and she wasn't always the happiest in the ring either. He did give me the Bitch RCC!!