Hey Julie,
When you have big uncontrollable backgrounds, like the pool, I think I might have gone with a theme...this may sound horrible and cheesie, but LOL, I think I might have tried the Dane on the beach blanket, under the umbrella (assuming there is one), etc.
I will defer to Jim's technical advice. The idea of shooting even a Dane baby from down low, I think is a good idea.
James