Though domestic Puppy breeds vary greatly—from small Chihuahuas to huge Great Danes—all of them come from the exact same ancestors and share ninety nine.9% of their DNA with the gray wolf. “Dogs ended up domesticated from a lineage of gray wolves which might be extinct,” Dr. vonHoldt suggests. b : https://psychoactivecannabinoids00009.theideasblog.com/36266861/getting-my-holistic-dog-care-to-work