We adopted MIL's neurotic, untrained border terrier (female), a bag of nerves, nightmare to take for a walk, wouldn't walk if anyone was behind us, went for other dogs, risky with visitors until she got to know them (we had to watch people's ankles). So when GD1 was born and spent a lot of time with us we were concerned about safety when GD1 got mobile. But we needn't have worried - it was amazing! The dog was devoted to DG1. She sat next to her on the floor, GD1 could climb into the dog basket, move her food bowl, corner her with the baby walker, the dog seemed to adore her. Never growled or showed any animosity. It was delightful, the dog turned out to be totally maternal.