The first dog that my husband and I ever purchased was from a rescue shelter. It was a yellow lab, a boy, 3 months old, that we named Buhner. He was good, but because of our young age, lack of knowledge, and working full time, he could have been even better. It truly is amazing how much he behaved for how little we knew how to guide him. Loved him!!
Labs are smilers. I never picked up on this until we got our Beagle after Buhner passed away. I remember quickly realizing this during Cora's first few days with us. I thought she was unhappy. I thought we had messed up. She! never! smiled! It was three months later during the heat of the summer did I see her smile ... she was panting. It was there that I finally realized Beagles must not get overheated, and therefore don't need to pant, and therefore don't smile.
Haddie came to live with us and she immediately smiled. Panting. Awww, it was fun to see a dog smile once again. I missed that part for sure!
It's fun to find the differences in breeds - the simple things - but differences nonetheless.