We are guessing on the breed. Winchester was abandoned so we never saw mama. We were told that she was a medium sized dog. Clearly you can see how adorable this little man is. He is full of energy and loves everyone he meets. He is good wtih dogs of any size and wants to play a lot. Wnchester would be a great dog for just about any family we do think that he weight when full grown will be under 50 pounds. If you are interested in meeting or adopting Winchester please email us at fochp@yahoo.com