Porndogs: The Adventures of Sadie (2009)

You'll never look at your dog the same way again.

Sadie, the most beautiful Yellow Lab in the whole wide world, lives an idyllic, pampered life in the suburbs. One day, she comes into heat and has no idea what to do with her new found feelings and urges. When she learns that her loving owners are about to have her spayed, she runs away to the big city where her sexual adventures begin.