Some things cannot be fixed. I urge you to get a qualified behaviorist (veterinary) to evaluate him. If he is truly unstable, rehoming him is not fair to him or the new home.
Baby Male B Mix on Petfinder-KY
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I do not know if this dog is still available but he looks almost PB except for the incorrect ears-drooping and non tight curly tail. Cute, Cute, Cute!
http://www.petfinder.com/petnote/displaypet.cgi?petid=14453856