I really don't want to promote anybody's work, but this DVD is really worth seeing. It features a lively presentation and most extensive footage of a variety breeds showing hundreds of examples of canine behavior and body language.
What is your dog saying to you and to other dogs ?
How can you tell when play turns into aggression ?
How do dogs show friendliness, fear, or stress ?
This DVD is for anyone interested in trying to understand dogs and their actions/reactions.
The Mclean Furgang gives this DVD the "two paws up" ! Available at Amazon.com
Even though not related to Sarah Kalnajs' DVD, this is a short movie about dog expressions: