Physically-challenged handlers and dogs are encouraged to compete in RallyO. Modifications of the course for both handler and dog are permitted at the Judge's discretion.
It is also the Judge's discretion whether or not a dog will be allowed to compete. If the handler has any concerns regarding the Judge's decision or wishes to challenge it, the handler should be prepared to present a letter from a veterinarian stating that the dog is fit to compete. The Judge will consider this in their final decision. As all injuries are not always obvious or consistent, the Judge shall have the final discretion on the day of the trial.
Veteran dogs (dogs over 7 years of age) may also have modifications made to the course because of their age without requiring a letter from a veterinarian.