Hello everyone,
Jenny has not barked at anyone else who has come over--and last night the babysitter came over and Jenny was fine. She didn't bark at all, went to the door, and acted curious and friendly. Just the way she always has. I think that the barking with my mom was because my mom just walked in the door when I wasn't right there to let Jenny know she's ok (since my mom is a stranger to her), so Jenny alerted me to her presence. But it truly seems to me that her barking was an exception to the way she normally behaves. I feel so relieved to see that Jenny still greets people appropriately and responds to my behavior/attitude toward people who enter our house.