And it all depends on your lifestyle. Everyone's home life is different. I also raised 2 boys with a Rottweiler.
When our pup came home I think my youngest was 3 at the time. We made allowances for that. I did not allow tug playing, food stealing, pinching, sqeezing, laying on the floor and rolling around with the pup, etc. No running like little banshees in the house. They got along splendidly. They grew up together and had a blast. Most winters the dog would pull the sled up the hill for the boys and gleefully chase them down the hill. The 3 of them had more fun in the snow (and also in the pool). It can, and does work, but not if the children do not know the boundries.
With this dog I am really enjoying the "rough play" and the tugging but I do not have little children underfoot. Like anything, life is a series of changes and adjustments.
So, teach him what it is you want him to do, correct him when he does wrong, don't hold a grudge, don't drill him constantly, enjoy his puppiness, teach the little girl boundaries around the dog, let him enjoy his 2 minute meals, keep him in classes, give him daily exercise, keep his brain working, socialize the heck out of him, and you should have a really well-rounded dog.
P.S. Don't forget those teeth, ear and paw checks!
