My youngest Pyr's also love water and we have bought them a kiddie pool just for them to play in when they go outside. I have noticed that Sheba looks a lot like my Zoey (in my avatar, Zoey is the Pyr between the Dane and they Newf mix) My husband and I have wondered if Zoey was crossed with something other than Pyrenees. She has the double dew claws and looked like a full blooded Pyrenees as a puppy- but now we wonder. She is not registered- but was from a farm that raised Pyrenees for live stock. I can honestly say that I recently showed her some goats and she was horrified that I would even suggest that she associate with them and she is scared to death of horses.
Also my male Pyrenees that passed in February, loved water. We had always wondered if it was because he was raised with a retriever that loves the water, but now with the puppies we are not sure. The old lady we rescued wont have any thing to do with water-