Dogs - Aggression or Protectivness?
I have always owned Pit-Bulls, they are absolutely the best dogs I have ever owned! I got a 3 mo old pit bull puppy sometime back in early September. His mom has always been on a chain so when my puppy (Rocky) was born, he was born into that chained environment... After he was able to walk, the past owners put him on a chain and never associated him with any other dogs, they didn't train him, and they didn't even bother messing with him.
He was really aggressive when we first brought him into the house with other dogs, attacking, lunging, biting, etc etc. I finally broke that habit after a month and a half with a professional trainer. Well, he is about 9 months old now and I took him to Tractor Supply for a new collar and he saw another dog. His tail was high, ears perked, making firm eye contact with the dog, then he lunged at the other dog and let out some low intimidating barks.
I got him under control after a few seconds but it really scared me. What if next time I'm not watching and he actually hurts somebody's dog?? He is an absolute sweetheart with the other 3 dogs I have in my house and he loves all of the family including young babies - he just licks them to death!
Well, recently, whenever one of the other dogs walks into my room he does the same stance he did in TSC. If the dog comes near my bed, he gets aggressive, and attacks. I have to break them up and put Rocky in his kennel for a while. He only started doing all of this over the past 2 weeks. He is all over me, gets lethargic when I leave even for a short amount of time, he won't let strangers near me, and he hates when the other dogs get in my space. He has been going to obedience school since I first got him and he was neutered about 2/3 months ago. He eats Pedigree puppy food (in the process of switching to adult dog food by Pedigree), gets plenty of exercise on our 11-acre yard, he has plenty of chew toys, he gets played with all of the time and loved on too.
So my question is...
Is this aggression? Dominant behavior? Protectiveness??