agressive ACD

Question
I have a 2 year old cattledog who has been very agressive since we got her at about 10 weeks. Regular obedience training was a joke with her. If I take her for a walk she tries to bite anyone who comes near me and especially hates bikes and skateboards. She goes so crazy I can barely hold her back. She has fully attacked two family friends because they were approaching my front door. I have tried shaking rocks in a bottle, which worked untill she got used to it. I have tried spray bottles, treats, positive reinforcement techniques. Each method only seems to last for a short period of time. I also have a 1 year old daughter who I worry she'll bite. It's been ok so far but if the dog doesn't see me in the room with my baby she will prevent her from moving certain directions and "boss her around". I love my dog and am willing to do whatever it takes to correct this agression, she has been so lovable to myself and my fiancee. I guess my real question is, can this agression of attacking people be totally corrected?

Answer
Now you know why most cattle dogs are not for first time, or inexperienced owners.  This is a working dog, bred to herd and guard.  The tendency toward bossy or aggressive behavior to strangers may not go away. The breed standard calls for them to be suspicious of strangers, and certain individuals will protect the home to the extent of not letting anyone in that they don't know.  You should probably contact a behaviorist in your area who is familiar with this breed.  However, given that she has attacked people, you may be safer to muzzle her in public (Morrco.com has instructions on this and you can also buy basket muzzles there - breathable and the dog can drink with it on, just can't be left alone).  In my opinion, your child should not be left alone with the dog.  That is true of any dog and child, not just yours.  However, in your case, I would not be comfortable with this dog being loose in the home once your child has friends come over to play.  Crate train the dog and have her spend her time inside the crate with an interactive toy when you have company (Buster Cube, stuffed Kong, etc.).  You can find a local behaviorist at IAABC's web site.