[horsnaround]

This sounds a lot like my daughters problem with her two males. They started fighting after living together for almost 3 years. We tried everything. I ended up taking Riley They get along great with other dogs just not each other. Even after over a year being a part we have to keep them separate. I do believe they would fight to the death. We tried walks meeting on different turfs. Medicines and also scents in the home. I would never leave your two alone together. I hope and pray you have better luck then we did.