Well, in poultry, there is a class for "mutts" sort-to-speak it's called All Other Breeds or something like that. It's a "work-in-progress" area. For other varieties that aren't recognized and other breeds that are being worked on.
Apparently there is a gamefowl showing area, although I'm not familiar with it myself. There is another forum that has it for game fowl, but as for jungle fowl, I could have sworn that I saw at least one jungle fowl at the shawnee show.
I have seen what you're talking about with the "random" critiques, but when a person asks if their bird is show quality, I just believe that honesty is the best policy. Otherwise, they'll have to go through the REAL cruelty at the show. It's a shame when people laugh at the younger breeders. I remember it very well and try to keep away from doing that. But I do believe that younger breeders should at least listen to the experience of an older breeder. Then take that advice and use it as they will.
As for showing "mutt" dogs, isn't there an "activity" that they do? It involves hurdles, etc? And then the water sports? Or is that only for registered dogs as well? I'm just glad we don't have to register chickens...ugh...can you imagine the headache that would involve?