What a great name! He has the look of a scoundrel on his face in the first pic. He's on my list of favorites. Many happy play-filled days to you, Rhubarb.
I just adopted a puppy today at an animal shelter in NC that looks so much like Rhubarb & they said she was a rat terrier mix but did not indicate what she was mixed with but I had my suspicions it was Lab & now after seeing Rhubarb its true. What a great mix. I am going to figure out how to post pics of my pup Pickles and you will see how much they look alike its amazing!