Hello. Long story short: we moved to a big house with over 50 windows and openings. My family consists of 2 babies (3&4 years old)my wife (working), a lady who helps for the house (and lives with us) and me (working hard

away from home 7am to 6pm).
So we bought a female Doberman for company and protection/alert. To tell you the truth, I had many male dogs in the past but without the babies and always living in the yard and never inside the house and as near socialized as this one.
Now this Doberman is almost 10 months old, sleeps most of the nights in my bedroom (has left the crate) and she is just the sweetest dog in the neighbor: extremely socialized, extremely friendly with all small kids and with our visitors, very friendly with all other dogs even with some cats.
My question is: is it possible that I have over socialized her, so that she will not become a good guard dog? From some signs I would say no, for example we have changed our bell 3 times (!) and from the first day she knew that someone is coming (good sign) and was waiting in the door to greed him and/or play with him (not a good sign).