
have owned two breeds of dogs and with both I have had toddlers, with the first my daughter was 14 months and then I had a baby when dog was two and a half. the second I had when my son was 14 months and daughter pre school.
both were great with my kids but very different in how they coped, and how I learnt to handle them.
The first breed high energy, quite highly strung, herding breed. This breed needs a lot of socialisation and forms very intense relationship with owner, needs a lot of input. I found her easily aroused and reactive as a puppy therefore rules were made about not being allowed to run about with children (so as not to herd), she also needed time out when there was a lot of excitement, and I got very good at learning to read her. I have a friend with this breed who has brought up a large family and now grandchildren, but they understand the breed and it's limitations and needs.
My current breed is somewhat different, but still large enough to knock children around and when Young would be too rough in play for a child, so the chill out when kids play rule still applies (AND I WOULD APPLY TO ALL YOUNG DOGS). This breed though seem to be able to stay a lot calmer in stressful noisy situations, and have never needed time out from family life, but are the kind who will take themselves off to get peace. They do not react to me stepping over them, dropping things, running the vacuum etc etc, so I find them easier than the former breed to live with as a family dog, but that's me.
On the other hand my present breed is more independent, and need a lot more training off lead, as they are not Velcro dogs like the first breedI had, and will follow their noses and go selectively deaf, but they are calmer when off lead, especially aroudn other dogs and people too, so there are trade offs.
Also there is a huge difference between owning a dog with Young children and bringing up a puppy with young children, which takes around two years.
My Friend and neighbour owns a Doberman and has two children a three 1/2 year old and a baby, yet the little boy was frightened by my puppy, and still would not cope with her at 15 months, because she kept trying to jump up and put her paws on his shoulders. I have to stand constant guard over her to tell her not to jump up onto small people as other well meaning big people have encouraged her to jump up (albeit she does it gently). I suppose if I still had small children living with me she would not do it as I would have been much more intent on preventing the habit.