Well, we have a four year old boy, two year old girl, 17 month old boy and an eight month old, 125 pound Saint Bernard, so I can completely understand your concern with your kids and puppy. In the past four years I have raised and fostered four puppies, with no dog bites occuring to the kids, so I can share with you how we raise our pups, using Gershwin our current Saint as an example:
- Gershwin is not allowed on the bed or couch. Period. Nothing that elevates his position in our home so he is higher than the kids.
- From eight weeks of age, Gersh was corrected if he mouthed a human. Some people feel that a puppy should learn how to mouth a human gently, but I strongly feel that the rule should be no mouth on human skin, EVER. It took some time, but by seven months, he stopped attempting to mouth my four year old son when they would be running outside together.
- The children will give Gershwin basic commands "sit, down ", and when he obeys them they give him a treat. It is quite funny to hear my 17 month old saying "dooowwnn " to Gershwin in the exact same no nonsense tone that I use.
- When we are all outside playing, that is when Gerhswin had the hardest time controlling his urge to run and knock over my four year old (who is a very high energy boy), but when he did that, we put him in a puppy time out, by leashing him and making him "settle " for 10 minutes while the kids ran around. As soon as he was out of the time out, if he tried to jump on them again, he was put back into it. Again, consistency is the key with that and now at eight months, even though he can be full of beans and want to play, he seems to know that the only object he can run and pounce on is his giant rubber ball.
Hope that helps a bit!