A fair way to do it, one that would hopefully keep thread on track as an exhibition, not a competition, would be to have ALL photos sent to one person who posts them anonymously. Say you have three RIR breeders; call them breeder A, breeder B, and breer C, and they send at least a front, back, side and top photos of three different birds. It would be captioned like "Breeder A, bird 1 front."
Ideally, no one other than the person taking the photos to be posted would ever know which bird belonged to who, so it would be completely based on the merits of the bird, which would avoid hurt feelings and encourage people to send in pictures of both good and bad birds. You can learn as much from what you should NOT use in the breeding pen as what you should.