Hello to you all. I am new to this forum. I am looking for some help regarding my dog Fergus. He is a one-year-old (this month) Irish Setter/Golden Retriever mix. I love him a lot but I am at my wits end concerning his constant marking of my house and territorial issues. He was potty-trained at three months when my husband and I adopted him. He didn't have accidents in the house or mark anything. He started occasionally marking in the house at about 7 months old, about a month before we had him neutered. Since then he was still marking in the house at least once every few days. We can never catch him as he usually does it while we are not home or sleeping early in the morning. We would try verbally rebuking him and putting his nose near the mess but I'm not sure if it was helping or making the situation worse by creating anxiety. The past two weeks he has been marking at least three times a day! I am always cleaning up pee (with a thorough amount of Pee Pee enzyme remover). I've been watching him as much as possible when I'm home, trying to be sneaky and watching him when he doesn't know I'm looking, but he did it within the two minutes I would walk out of the room and even once while I was in the room in a corner I cannot see from my desk. My husband works from home quite often but Fergus doesn't seem to mark during that time even if my husband is in his office upstairs. He marks in a variety of spots throughout the large main room too so I can't focus on just one spot. I think a lot of the problem stems from the dominance battle between him and my sister's two dogs (especially the male Tumnus). They are pug-shitzus and much smaller at 20 lbs each than Fergus's 70lbs. They were in the house before Fergus arrived. They mostly get along fine and play often. All three dogs demand a lot of attention and they seem to get jealous very easily even though we try to give them equal attention at the same time. Tumnus and Fergus will stare each other down quite often and Fergus over tries to tower over Tumnus in a dominating position. Little things like brushing against them when this happens or coming in from a walk with Fergus will set them off and they are biting and snarling at each other. My husband tries separate them and Fergus often has Tumnus by the scruff of the neck and I have to grab Tumnus to keep him from jumping back at Fergus while my husband holds him down. No serious injuries have resulted from these incidents but I fear that they could. Whenever we recognize the initial behavior especially low growling we try to grab a glass of water to splash them with if it turns ugly. Flicking drops of water at them seems to discourage the behavior but I am ready to drench them if need be. These incidents have occured a lot more often this week. Sometimes several a day. They usually come in boughts over a few weeks. I believe the increased marking is totally related to the males being territorial but I can't seem to improve either condition. The marking has become so much worse and it doesn't seem to matter if we are home now or not. These issues are causing me a lot of anxiety and resentment of my dog. I would be so appreciative of any advice! Thank you for listening to my problem.