**@bluebert Hi. I am writing from Colorado where we rescued a female (very different 'creature' - as I do not truly consider them to be dogs, per say) eight (8) years ago when she was four (4). After being exposed to Basenji for about a year (male brothers and a young female), we made the decision to rescue her. She was extremely abused (1/2 her body weight when surrendered). Therefore, she came to us with different issues, but female aggression (fear and separation anxiety) in a different fashion. Although I cannot claim the expertise of the Breeder or those who have been owned by multiple Basenji, we do have a very close friend who renamed her for us (converted her previous English name to his Congolese dialect) who is from the Congo. He is from the Congo and filled us in at length about what we both found to be these amazing, but never truly tame creatures. He mentioned if they were not inter-bred, they would ALWAYS remain feral in nature and therefore, as previously mentioned, retain some of their ancestral traits which are very 'wolf-like' in nature. We have seen that with Bakagi. She has also constantly tried to establish herself as the Alpha female in our household, from which I constantly must perform reinforcing behaviour she is NOT. It seems a bit overt at times and she has indeed, showed some of the behaviour your young male has although never biting someone in the face. I am uncertain as to how you dealt with that situation but the discipline should have been immediate. Not cruel, but IMMEDIATE. It is the ONLY way they understand and comprehend. One absolutely cannot compare these animals to ANY other as one must remember they date back to the days of Pharaohs (at least that is the earliest recorded history of them - 5,000 years ago!), when the African Kings took them as gifts to the Pharaohs who adored them due to their silence, loyalty and regal appearance. They even mummified them (I have seen the mummies).
Our Basenji STILL has separation anxiety when crated at night or when we are gone. We have tried not crating her at night and allowing her to sleep in a room with us, but the aggression returned. As soon as we crated her, the aggression subsided.
To control the separation anxiety, I use a 'white noise' machine AND Baroque Classical Music (recommended by Colorado Basenji Rescue). It works! However, we DO have to use BOTH.
I HIGHLY agree with diet. If you consider that our behaviour - especially that of children - changes depending upon diet, think about that of him being a young male.
I also agree the dog run sounds like a great idea in addition to the homeopathic remedies. We have NEVER allowed our Basenji to be given ANY 'people' food and have always scrutinized her diet and supplements. I IMMEDIATELY remove anything which appears to alter her health or behaviour in ANY fashion as when she leaves this planet, I wish it to be due to natural and not man-implemented causes.
Biting of ANY kind is NOT acceptable. If he is chewing, are you offering him alternative things to chew - I.e. bones, long-term treats, Nyla bones (NEVER rawhide or tennis balls as rawhide is very bad for digestion and tennis balls are full of sawdust which will rapidly wear down their teeth).
I am not certain I have been of much help but if you wish to try to keep him and you presently feel you are unable to handle him, perhaps the breeder would agree you may be able to 'foster' him out for a while as it would also help him to be socialized if he is fostered with someone who is presently owned by a Basenji and has the patience to socialize him. His behaviour could prove to be entirely different around someone else outside of your home.
I will keep you both in my prayers as I feel these amazing creatures are well worth the effort.