I once saw a english bulldog mixed with a golden retriever. It looked like your basic GR but it was a bit more buff and was a little shorter. One thing that really popped out at me was it had an underbite. Its bottom teeth came up over the top jaw. I saw pics of the parents two very beautiful dogs. If I could mix anything I would mix the Dogue de Bordeaux (Turner and Hooch)/Beagle/Pit bull/Jack Russell Terrier/Greyhound. Wouldn't that be interesting!