In all my years of puppy ownership, I have NEVER encountered an "aggressive" 11 week old puppy. There are no bad pups, but we may have bad owners. I mean that respectively. Pups, especially EBD pups are wild, headstrong, nippy, and will be out of control if allowed. It is worse with kids in the house as they are usually ramping up the bad behavior unwittingly. When I got Bogey ( 8 years ago) I thought I got the spawn of satan. He was SO hard to control at times. With the great advice of the many owners here, I learned the "art" of raising a bulldog. Bogey is now the most gentle, loving dog ever. And Jackson ( my 1 year old) is the same, although I did not go thru as bad a puppy time with him. You neeed to be in control at all times. The kids should not be over stimulating your pup. Pups need love an firmness, NEVER anger to discipline. And just like kids, they need naps and time outs. I truly found my pup would rev up his bad behavior when he was over tired. You need to get some puppy training started today! You will never regret it!!