Welcome to the Forum. It sounds as though this 'protectiveness' has been going on a long time. I agree that probably it would be best to get help from a behaviorist but make sure that they have experience of Basenjis. In the meantime keep him away from your guests. It's possible that he's stirred up by the excitement so it's best to try to keep him calm when people are around.
Hello from Seattle!
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Hi everyone!
My name is Merry and I live in the Seattle area. Currently I do not have a basenji but I had a girl named Tano for 16 years. She was my best friend ever and I will never forget her - the good and the bad.
It's great to see everyone sharing stories and photos of their dogs!
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Welcome. 16 years is a good long life. Do you plan to get another basenji?