If any of the suggestions offered in the Agbeh group are unclear to you, please ask questions.  A limitation of the email discussion group is that we cannot "see" the dogs you folks are describing. We also all write our descriptions in a type of shorthand. We do not intend to do so, but that may happen. As a result, some of the suggestions may not be as clear to you as we wish.  Please ask questions for clarity any time you wish by writing to the Agbeh group, as a subscriber of course. The group does not accept messages from non-subscribers.

Owner reports that her 2 y o terrier after having been walked while wearing its harness, bit the husband when he attempted to remove the dog's harness.  

Many dogs, and perhaps in particular, terriers, need to be desensitized to physical handling. When a dog is fearful, reactive, worried, concerned, nervous, anxious about someone fussing about its neck and/or about its body, it will attempt to fight back in the only manner it knows. You see, the dog is attempting to communicate with its squirming.

A desensitization/behavior-modification program has some specific requirements. I believe it's best initially to use a training set-up rather than wait for life to just happen and hope to respond to that.