
Your bitch will also be more likly to get an infection if you take her out, especially to a dog show.
She will gain alot of attention from male dogs and will likely get grumpy with them, making her, from a distance, look like a snappy dog :(
She will not be looking her best (any female will know how she's feeling! :D )
She might be quite large in a certain area which doesn't look attractive and everyone can tell that she's in season.
You will risk your reputation
As your bitch may be in prime time, it won't take an experianced dog very long to get into the right position if he wanted to...mating on the premisis is forbiden and I'm sure you wouldn't want that to happen.
Overall the rules allow you to take her to the show (or any other) but do the pro's weigh out the cons?