Professional dogs can also serve as invaluable aids to disabled persons and even detect low blood sugar in individuals suffering from diabetes. (web-rover.com)
Keeping a diary and collecting images / photographs and newspaper or magazine cuttings or photocopies are invaluable aids for when you finally sit down to collect your thoughts and start writing your book. (authorhouse.net)
Among the breed groups categorized by the American Kennel Club, dogs found in the working group stand out for their history of providing invaluable aid to humankind. (notinthedoghouse.com)