I'm putting this in general behavior because the aggression section specified GSD's. MODS, please move it if necessary.
My parents, as many of you know, have two large-breed dogs. My dad's is mixed with husky, beagle and dalmation. Mom's is a lab/husky/akita (and may have some pit in there too lol). Sooo just your average lovable mutts.
The past couple of weeks, however, they have started to act strange. There has been no change in diet, exercise, training, routine... Everything is the same.
Anyway, it started with Tattonka (now 6 yrs, neutered since before we got him). He's never enjoyed going outside but he has ALWAYS gone out to do his business. Always. Well, about three weeks ago he began peeing/pooping in the house. They began crating him at night again and he stopped at night. But any time he was left in a room alone (even if he was in the living room and you were in the kitchen or hallway), he started peeing on stuff. This has stopped in the last couple days.
Two and a half weeks ago, he began snarling at Motomo (5 yrs, neutered at 6 months). Two weeks ago, the first fight broke out. It has been getting increasingly worse. And at this point, they are keeping the two seperated unless on a walk.
Initially I thought they were fighting during meals (they resource guard against one another heavily, even though they don't mind us messing with them or their food). But when I asked my father, they are still being fed in seperate rooms and none of the fights happened during a meal.
The most recent to my knowledge was Friday while I was visiting (they HAVE still be snarling and hackling at each other through the door and when they start out on walks). Tattonka had puncture wounds on the scruff of his neck and Motomo had to get 2 stitches under his left ear. I was watching them and Dakoda. Everyone was just laying around, the boys on different sides of the living room. Motomo was asleep, Tonka was watching the tv and Koda was asleep in front of me. Tonka randomly, and I do mean RANDOMLY, jumped up and lunged for Motomo. I couldn't break it up without getting myself bitten, and Koda ended up being the one to break them apart.
Now here's where I need help: What could be causing this? They're both neutered, nothing has changed, and they've been BEST friends since they were puppies. I also check them over for injuries routinely and neither is wounded (or was before their fight Friday). So why could they be fighting now? Could it just be something to do with the hurricane up North? I know it isn't just the cooler weather because they both actually love it when it's cold out.
My parents are willing to rehome Tonka if necessary. Motomo, on the other hand, is staying because he isn't a dog they could pass on to a new person with a clear mind.