@reneemay I am an American but for two years I lived in Geraldton, Western Australia, about 450 km north of Perth. Not much between the two places - a road house and dead kangaroos. I understand the challenges of living in (relatively) large but fairly isolated communities. Interesting times.
@reneemay Castration is likely to have little to no effect on your boy's behavior. Do not count on it helping you. Have you contacted the nearest Basenji club to you for help and advice? Not knowing which state you live in makes it difficult to to give you more information specific. There is the Basenji Club of Victoria - http://www.basenjiclubvic.org.au/ , the Basenji Club of NSW - http://www.basenjiclubnsw.org/ , the Victorian Basenji Breed Association - http://www.vba.org.au/ . These organizations could be useful in helping you find the best professionals to help you with your Basenji boy's issues.
@malti35 Have your vet send the blood draw to Dr. Dodds at Hemopet. Very few, if any, veterinary labs run a complete analysis especially for thyroid issues. Dr. Dodds has been tracking certain breeds health issues for years, Basenjis being one of them. You will find the forms and other information at: http://www.hemopet.org/
I changed vets because, even though his in-house lab did not have the capabilities to run a complete thyroid analysis, he refused to allow me to send a blood draw to Dr. Dodds. Good luck.
I am sure that you are praising him but probably not in a way that gets his attention. I had to house train a 6.5 year old Basenji. It only took 2-3 weeks but I had to make a complete fool of myself praising him loudly and effusively. My neighbors were a little concerned about my seemingly erratic and lunatic like behavior while walking Valentino BUT he was trained quickly and completely. During those 3 weeks there were accidents in the house but I just ignored him, cleaned it up, then took him on a walk and behaved like a lunatic with compliments when he peed.