We had a 18 month old Lab when first DD was born. He was magnificent with her. We took care how we introduced her to him and from then on she could do anything she wanted with him, although we taught her to be gentle. He loved both our DDs and had the patience of a saint with them. With our current Labs we are always careful with GCs, especially as one son-in-law is phobic, which of course extends to his fearing the dogs being near his children. If he is with us we shut the dogs in another room. Whilst the GC are still so small and therefore potentially likely to fall on top of the dogs, we are extra careful. If a dog is not already in the family I would recommend, as others have, waiting until the child is old enough to enjoy a new dog; they are hard work and a puppy is like adding another baby to the mix, especially if it is to be properly trained. However, the health benefits to children brought up in a household with pets is thoroughly proven and accepted by health care professionals now; less allergies, asthma, better immune system etc. Much more of a danger is the parent (or GP) hovering with a bottle of Dettox or similar, squirting at every perceived speck of dirt.