Hi Dawn, my names Colleen and i'm from Melbourne!
I'm really interested to hear peoples thoughts on this as my 6 almost 7 month old male basenji who isnt desex as yet is displaying quite a lot of seemingly random aggression toward my other dog who he lives with. Food is the main trigger, but more and more i think it's his testosterone really kicking in, i think hes trying to test out my other dog too see how much he can get away with and how much he can boss him around.
Its making life a bit edgy for myself and my dog who cops the outbursts!
I'm a vet nurse and it is well know that desexing a male will definitely drop hormone levels significantly and therefore any hormonal aggression along with it. It usually calms them and dog/territorial related aggression can be helped by neutering.
I think that if you really want to keep Cougar the best way to go is to desex him. If it becomes unbearable, then its not going to harm anyone by getting him desexed. And to be honest i think the breeder should think twice about breeding from a basenji who has bitten people… but basenjis will be basenjis. No doubt desexing will help, but no doubt the aggression wont be 'cured'... i think then you need to do your bit by training him in conjunction.
Best of luck, sounds like we both need it!