Neutering is not going to help - training is. But a good trainer will train YOU to deal with the dog. If a trainer can get him to behave but you can't - there is little to be gained from paying out money. This is something you should never have allowed to happen, but since it has, I think you should deal with it and @JENGOSMonkey has given you a good idea to start you off. Withdrawing treats is a good idea, but also, get up and walk away. He could be biting to get attention and therefore you withdraw the attention at the first sign of a bite, with a firm NO.
Basenji mix aggression
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I rescued a basenji mix in December. He is such a love able dog. He does bark and doesn't have a curly tail. He looks like a basenji and has a lot of the traits. When I adopted him in December, I had a five year old mixed male. He passed in February from pancreatitis. In march, I adopted an eight week old female jack Russell/Bassett hound mix. She was only 12 pounds when I got her. Tucker, my basenji, never hurt her, but he plays rough. Even after all the little teeth bites from my puppy, he never hurt her. He is very aggressive to dogs, tho. I will have to pay attention to the sex of the dogs. I know he's aggressive to the female in the neighbors yard. I'm getting upset, because people think he will hurt their dog. And, honestly, I don't know. Please, can anyone give me their advice.?