Do you believe dogs can know or sense pregnancy? We found out yesterday that we are due in June. Today my 10 lbs chihuahua took on my 70 lbs lab. The chihuahua was on my lap, the lab came over, and tried to put his paw on my leg. The chihuahua went crazy snarling and growling. They are both normally the best of friends and have always been inseparable. I just wondered how many of you feel they can sense the pregnancy? If it helps, the chihuahua had puppies with her prior owners so maybe that makes her more sensitive?