If you want to learn more about training and controlling your Jack Russell, my ebook is bound to save you hours of training trial and error and relieve a lot of stress from the process: The Jack Russell Lover's Ultimate Guide to Training comes complete with a full chapter on mix breeds.
by Karen Jones
I read the question about the individual with 2 male JRTs with interest. I bought 2 females. Big mistake. The more agressive Jack attacked the less agressive one when I was around because of jealousy. They were just starting to get their hormones going at 2 months. It was a bloody mess literally. I had to sell one. Really broke my heart. So it's not just males that do this!