Hi Debra, if you are referring to the RCV Champ Show this weekend, you will need a fur saver chain. These are the only chains exhibitors are permitted to show their dogs in at specialty level. Some judges permit martingales for babies.
The reason we use fursavers is so they can be locked off. In specialties the dogs are encourages to pull into the chain and we can have them choking themselves.
Don't panic, you should be able to buy or borrow one at the grounds.
If you're planning on showing at specialty again, contact Tract Lane or Heidi Yule to purchase a suitable fur saver chain.
Good luck and have fun