Again, I suggest hiring a qualified positive reinforcement trainer or behaviorist to assess your situation if at all possible. I know not everyone realistically can go out immediately and hire one like we all suggest. So.....in the meantime, you could try counter conditioning (CC)
your dog Robin to the trigger, which seems to be the movement/walking of visitors in your home.
Here's what CC would look like in your situation:
What would I do? I would keep Robin on a leash, or a drop leash, while you have visitors over. If possible, ask your friends or family to help you guys out so you can practice frequently. Only have visitors help out if they are able to listen to your direction, bc you will know when your dog is comfortable or not, and you do not want the helpers to make things worse.
So, have your dog on leash with you. Have a treat pouch on you LOADED with ultra yummy high value food bites!!!
Have your guest/helper sit down. Start with the person sitting across the room, not right next to you, just to be safe. Move a chair if needed to practice this!
Have your guest/helper sit down.
Then ...ask them to get up in a moment or so.
As soon as your guest gets up or starts walking, immediately
give your dog a continual stream of yummy food bites.
Cue your dog by saying something like, "Oh, look, Margie is getting up now" Or "Sam is walking around, isn't that cool, Robin?" Or, "Hey Robin, look, Susie is moving, we're good with that right?" Or whatever you are comfortable saying.
Say it gently, politely
, like you are talking to someone who is worried, but needs firm positive reassurance that everything is A-Ok, no problem here. Yelling or harshly correcting a dog during these sessions will not help a dog to overcome his/her issues.
If you are feeding Robin the treats nonstop, your dog will be eating them (if they are high value and yummy enough!!) and not be barking. Let your helper walk around for a very short moment at first (3-5 seconds is plenty) and then have helper sit back down. Stop the treats when guest sits. Do this over and over again, increasing distance walked over time as your dog is learning the game. Soon Robin should start to look at you for the treats whenever your helper gets up and starts walking! Like. "Hey, Mom, Susie, is walking, where's my treats????" That is when you know the CC is working and you guys are making progress!! Home cooked chicken or meats work wonders for this. No crappy store bought treats, please.
Think "Open bar, closed bar." Visitor walks= amazing treats flow.
Visitor sits = No treats. Zip. Nada. You will be teaching Robin that guests moving/walking =good stuff!!
Good ole counter conditioning (CC). Change the mindset and the new behavior will follow since the trigger will not represent a stressor.
Important: Do NOT initially require your dog to sit or lay down or anything else while you practice CC.
You just want to create a new correlation in your dog's brain that guests moving around your home is a good thing. You can work on asking her to sit or whatever later after she actually has the new association down and is regularly happy about people walking around your home.
Try it ---Counter conditioning (CC) really, really works if you are patient and understanding--- and make it fun and highly rewarding!
! I use it all the time with my dogs and other dogs