Hola I am Ena :) , from Peru, now living in Calif. I am owned by a basenji mix named Zorro-BaBa. He is 2 1/2 years old. I rescued him when he was six months old, he was a stray with a dislocated hip. He is now the love of my life.
Welcome Angelilca!
I'm the "mommy" of a B girl with Fanconi, also. I really encourage you to join the fanconi yahoo group. It's a GREAT resource! I have learned so much just from reading the posts of people with current issues and the experienced fanconi dog owners' replies. Also, they keep a list on the website of vets that are known to be knowledgable about the disease and are willing to communicate with Dr. Gonto (who wrote the protocol) directly when needed - because not all are. The list is by state and you can find it on the site under "files".
http://pets.groups.yahoo.com/group/fanconidogs/
Good luck with everything and keep us posted!
Sadie
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.