Attachment Issues

My 6 month old red tri male Aussie seems to be having attachment issues. I got him at 16 weeks. When I got him he was so terrified and not very well socialized. I spent a lot of time with him trying to comfort him in the beginning because he was so scared. As a result of nurturing his insecure state of mind as I did he now is so attached to me and no one else. This is not just your run of the mill bonding. I mean he will not EVER let me out of his sight and is constantly tripping me when I walk so he can be as close to me as possible. I can't even look at him without him trembling with excitement. When I try to pet him he cannot calm down enough for me to be able to. He will not pay any attention to anyone but me. He gets plenty of exercise bringing in cattle with cattle and running around the farm on a daily basis with my other Aussie. I can't teach him anything because he is too concerned about me constantly. Don't get me wrong I love that he is a loyal dog but this is extreme. Is there someway to make him more independent?

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Aussie Behavior Problems? Australian Shepherd Lover's Guide To Australian Shepherd Training & Care