When I attended my seminar with Rachel Page Elliott, she reminded me of a retired school-teacher. Certainly in her 70's by that time, she passed away in March 2009 at the age of 96. She was a Golden Retriever breeder for many years, raising about 50 litters over four decades under the Featherquest name at her River Road Farm in Concord, MA . At her memorial service, 50 Golden Retrievers wearing tartan bandannas and accompanied by their owners comprised an honor guard. In the middle of the canine lineup walked Mrs. Elliott's 10-year-old golden retriever, Tammy A bagpiper let the honor guard, marking the breed's Scottish origin.
There is a Dogsteps DVD available, published in 2005, and you can also see Rachel Page Elliott talking about how she came to write her books. There are other resources online that talk about canine anatomy, but for the definitive and most understandable explanation, start with 'Pagey' and you will be amazed at what you learn.