Hi! I am new here, but have a problems with my Babies. I have 2 neutered males. One is 3 and the other is 4. They are siblings. About 2 weeks ago they started fighting and it evolved into full blown attacks. The stare down, growling, then the attack. Now they have drawn blood and are licking their wounds. I want my happy family back. Can anyone help with advice. I have timed them out and separated them. The 4 year old out weighs the younger one by about 2 1/2 lbs.