Sebastian is a 17 month old English Mastiff. He is a great dog and is fairly well behaived. He has been socialized very well with adults and children. He does have a lot of puppy still in him. My wife and I just found out that we are expecting our first baby. I am looking for suggestions on the best...

Sparky my 9 week old boxer pup, gets a little more rough with my 6 year old, then any of my other kids. Dom, (6) plays more roughly with him then my other two. I just need some advice on how to handle both of them. Sparks, barks at dom like he is gonna "get him". I tell Dom to get away and...