I agree with defjef, cavitating, Nessie is one very happy looking dog to be near the water. I wonder, though, if she isn't actually a
bernese mountain dog - Google Image Search rather than an
australian shepherd - Google Image Search
And Joanne Turner, your story of giving your new companion a second chance at the life aquatic touched my heart. I know you miss your previous dog terribly, but there is always room in a compassionate heart for another opportunity to experience the blessings of the human/dog bond.
TaoJones