We just got a 2 yr old male, he is absolutely the sweetest thing in the world and came along at the right time as we lost our Cocker Spaniel a few weeks ago. He seems to fit right in with the Jack Russells but is having issues with Corky, our GS Mix, actually Corky seems to be the one with the issues. I did some research online and have a good understanding about the breed and possible health issues. He is well mannered but I plan to go through a beginner's obedience Class with him and also with Corky too. He, Corky and our younger male Jack all 3 need to be neutered as the testosterone in the house gets to be a bit much. Meet Gordy!