A pup! So you are building stamina in a young dog. That's awesome!
Didn't realize he was so tiny. Our little dog, Nicky, is a Maltese/poodle @ about 15 lbs. Chloe is about 30. I'm done with big dogs. I love the portability of the little ones if nothing else. Our late Lab, Lucy, was a big PITA to take anywhere.
