I posted last week re my newly acquired whippet/collie/terrier (possibly) doggie who is a bit overactive when not reclining on her bed.
She has now started going manic at the sound of the doorbell - which is rather strident as I need to hear it all over a fairly large house and she is lying in the hall.
Today the postman called (and rang twice 
) and she went berserk - any tips on how to desensitize her - I tried going outside and ringing the doorbell but she knew it was me so it did not work as I hoped. I rewarded her for not going demented when it was me at the door though - positive reinforcement.
She is 8 yo not a puppy - so this is obviously learned reaction or something she was encouraged to do in a previous home.
My postie is lovely - I do not want him discouraged 