I posted this reply yesterday but in your other thread about 'possible new dog'. I didn't see this thread until now and think it belongs here though so I'll re-post.

That is one BEAUTIFUL dog!
I'm thinking she looks like a Chesapeake Bay Retriever cross.
Here are some pics of Chesapeakes. They have the square-ish heads and the tails are a bit bushy and they sure LOVE water!

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