My brother and I have two dogs trying to kill. These are also two males who are brothers to each other. They’re a year and a half old and they spend the day fighting, so we had to separate them. Can we do something?
Dogs are competitive when they reach adulthood, and while there are external reasons causing this confrontation, in your case it’s clear that they’re fighting for the top spot in the herd hierarchy they understand they’re going through. It’s a shame you couldn’t help them build that relationship when they were still puppies. At this point and for them to be together again, in principle there will be only two alternatives. On the one hand, training to teach them what place each occupies and to improve their socialization. On the other hand, sterilization or castration causes a hormonal change that reduces the territorial and hierarchical meaning of both. In principle and without knowing animals, these are the two main alternatives. In any case, you should go with them to your veterinarian and have them evaluate another alternative on the spot.