[ArmaniMan]

Recently Armani has started marking. He was neutered at 6 months old and had never marked before that time. He is going to be four soon and only started marking this week. Chloe is fixed so obviously there is no problem with a female dog in heat. He is marking both at my place and at my parents (they babysit him and Chloe while I am at work). I only started working a few months ago, I had been in school before that and therefore had more time with him, also I was not working for a few months between school ending and me finding a job, so I was home ALOT. This is the only change I can think of that would be causing an issue. Please help! How do you train a dog to stop marking?!