I actually got a puppy from the pound when my DS1 was born so they grew up together. I got another one when my DS2 was born and they grew up together. We still have the same dogs and they have never even batted an eyelash about the other kids turning up. They come up for a sniff and a good lick and then wander off lol. BTW they are both outside dogs and don't come inside at all. They never have. I used to have an old shepherd too and she was such a sweetheart that the kids could climb all over her and she even used to help them start to walk. They would hold on to her fur and she would take tiny steps so they could keep up. It was soooo cute to watch them. I wish she was still with us but I had to make the heart breaking decision to have her put down when her hips went on her (age 13). I think it depends on the dogs and what their temperament is.

My older male dog is not as patient as my older female dog and will walk off when he has had enough so I make sure the younger kids don't follow him but my female will lay there and let the kids pull her ears and stick fingers in her mouth and eyes lol she has never even growled at any of my children. They love it when the kids come outside to play and they can join in