
Well you do have to show the right number of passes on leaving for the number of dogs you leave with, same to get in.
Dogs are only allowed in and out of certain entrances, which was a pain for me wanting to go from hall five to hall 2 which would have been quicker to nip across from outside.
So stealing the dog is unlikely, but of course doing something to them on the bench is a possibility, but as no-one will know which dog belongs to who when all the exhibitors are around the benches, the chances of a stranger interfering with your dog are minimal as exhibitors will recognise fellow exhibitors and a no good is likely to stand out.
Most people there are dog lovers and will keep an eye out for your dog if you ask them.
In fact I showed a dog for someone who had to work, the brought him before work, and a Friend looked after him until I got there to take over and took him home with us where his owner met us to get him back on the Sunday. Unfortunately he didn't place, but he showed fine and was as happy as Larry all day, so hey ho.