Indeed, on ANY animal showing?
Broadly speaking, I wouldn't want to take part in such shows even if I owned a perfect example of a pedigree. I guess I'm generally against selective breeding of domestic animals on the grounds that many of these breeds end up passing on genetic disorders or abnormalities of one kind or another. Often, I hear folk discussing which pedigree dog (or cat) to get, and those in the know saying, 'You want to avoid such-and-such a breed because they suffer with this or that defect', and so on. Which is not to say I judge (no pun intended) those who own pedigree animals, before anyone gets unduly defensive!
I'm of the opinion that allowing animals like dogs and cats to cross-breed strengthens the gene pool for such animals, making them more robust healthwise. Moggies seem to withstand a lot more and live longer in a lot of cases than their pedigree cousins, and I'll presume the same is true for dogs.
That's my take on this. Anyone care to share, and perhaps put me right if I've got this all wrong?