You wouldn't think that showing would be so tiring, but the most tired dogs I've ever seen were always coming back from a show. We always knew the ride home would be quiet.
He actually does this every night.
But you are right, showing IS "work" for them. Especially Sunday, when we had to get there early to get under the tents before the hard rain hit, then, although I was HUGELY pleased with his OH BOB win, waiting around for groups, for a young guy, made for a very long day. He still showed his little heart out for me, but I have asked NOTHING extra of him for the last couple of days!