This questionnaire was developed by Hannah Salvin, Paul McGreevy, Perminder Sachdev, and Michael Valenzuela. You can find the original research here: http://goo.gl/9U0G5
The questionnaire can be used in dogs that are 8 years or older, and provides an indication of whether a dog is suffering with senile dementia. Once you have completed the questionnaire, you can show the results to your veterinary surgeon, who will be able to investigate your dog's problem and offer treatment.
This questionnaire is not a substitute for professional help.
if you are in any way concerned about your dog's physical or mental health, you should contact your veterinary surgeon for advice.