angry piglet

Question
I have a male mini pbp that's approx 3-4 months old. He is neutered, his name is Chester. He was completely unsocialized when I got him at 4 weeks old, but is or I should say "was" coming around nicely.
It seems that I've hit a wall in his socialization. Example: He loves to sit with me on the couch, but lately becomes aggressive towards me. He will very quickly move to bite me if I try to move him or even attempt to resituate myself while he's sitting with me. It's gotten so bad I no longer allow him on the couch with me. When I sit on the floor with him, sometimes he's fine, sitting quietly enjoying being pet and scratched, more often he stands very close to me, pushing his nose into the carpet, slowly moving it closer and closer to my leg or arm with a rooting motion. If I move my leg or arm at all, or attempt to move him away from he will immediately bite at me. I have nicks all over my hands from being bitten by Chester.
I was told that pigs were generally docile creatures but it seems to me like he's ALWAYS angry and becomes aggressive very quickly. He follows me wherever I go, and goes into a squealing panic if he realizes I'm not in the same room, yet when I try to spend time with him he constantly attacks me. I just don't get it.
I've owned many farm animals in the past, however this is my first pig. I do keep him indoors, he has a large crate for his "personal space" and I do take him outside to do his "business".
Any advice would be greatly appreciated. I don't know what I'm doing wrong. If I can't change this behavior then he's going to have to live outdoors with the other livestock, because I can't/won't share a house with an animal that so readily attacks me.

Answer
Hello,
I have seen this problem over and over again.
When a piglet is weaned too young it misses out on the discipline that it receives from it's mother and siblings.
Piglets should go to their new home until they are at least 8 weeks old.  The longer they stay with their siblings the more they learn how to behave.  Piglets bicker between themselves.  They push, shove and nip at one another when the other piglets push, shove and nip at them.  It is just natures way of teaching young animals that when you bite you get bit back!
You will now to do the discipline yourself.  It's just so much easier when they are very small because they are strong little animals.
You will nee to react to him immediately when he is aggressive with you.  Swat him on his snout and use a loud voice when he tried to bite you.  Be prepared and watch for the signs.  You can set him up also.  Put on heavy cloths so he can't actually hurt you and interact with him in your normal manner.  Just be ready to give him a significant tap or swat when he attempts to bite or push you.
You a very loud voice and just don't put up with his aggression.  
Hopefully it is not too late to install the basics in him.

Good luck,
Patty