No, normally you may not wash them there, nor do you want to. They won't have warmish water, and spa time is to be a comfortable experience for the bird. I forgot to mention, you take small binder clips, 2 per bird, and solo cups, at least 2 per cage, and pine shavings.
Back to the bottles of water. Sometimes the shows don't have water available for them, so you have to provide your own. You use 2 solo cups, per bird. One for feed, and one for water, then secure them to the cage with the binder clips. You will make sure their water is topped off, before you leave for the night, then again in the morning for the judging. The second reason you want a bit of water, is so you can clean inside their toenails if they step in the pooh. First, put in fresh shavings, then you dip the soft toothbrush into a cup of water, and do a quickie clean. The baby wipes will clean mostly anything else that gets soiled. It's pretty easy peasy, because the birds are already clean. If the show does have water, some of the exhibitors will be lined up to use it for watering their birds. You don't want to hold up the line. To me, has always been easier to carry my own.
Again, go to a show, or two so you can learn, before you attempt showing.
Back to the bottles of water. Sometimes the shows don't have water available for them, so you have to provide your own. You use 2 solo cups, per bird. One for feed, and one for water, then secure them to the cage with the binder clips. You will make sure their water is topped off, before you leave for the night, then again in the morning for the judging. The second reason you want a bit of water, is so you can clean inside their toenails if they step in the pooh. First, put in fresh shavings, then you dip the soft toothbrush into a cup of water, and do a quickie clean. The baby wipes will clean mostly anything else that gets soiled. It's pretty easy peasy, because the birds are already clean. If the show does have water, some of the exhibitors will be lined up to use it for watering their birds. You don't want to hold up the line. To me, has always been easier to carry my own.
Again, go to a show, or two so you can learn, before you attempt showing.