My 18 pound cockapoo (2 years old) was attached by a lab about 2 weeks ago. He received several puncture wounds on his neck and body. Since then my dog is very aggravated by any noise, sudden movement, and by the sight of other dogs. I have been leashing him in the house so he does not go after anyone who comes in. He has even gone after my husband and kids if they get up to quick. I am afraid that he might bite a child, adult or even go after another dog. I don't know how to desensitize him. Any suggestions would be helpful.