Derby entry requirements seem to come up every year. A club can elect to hold a Derby with any number of dogs. However, in order to have the event qualify for points towards the Charles Morgan Memorial Trophy (otherwise known as the Purina High Point Derby Dog) awarded to the Derby dog that has accumulated the largest number of Derby points, all Derby Stakes, including Specialty Trials, will carry points provided they have 10 starters.
I hate to see them cancelled with less than 10 dogs. I've got a Derby dog who hasn't seen any water this year thus we won't run until June at the earliest.