Hi I wonder if anyone can help with this one our Dobe is nearly a year old and male, he has regular walks and when we are at home the back door is always open yet he still chooses to wee up the walls and the door frames in the hall.  It seems to be worse after I have cleaned the carpets and washed the walls down.  The thing is the hallway is really starting to smell as I cant seem to keep up with the amount that he scents he even wees on the carpet cleaner.  Does anyone have any suggestions we have tried telling him off making him go outside but he just does it again when he comes back in.  Would having him nuetered help this problem.

What are you cleaning with? If it's anything that contains bleach it'll only make him do it more. The best thing is to dilute some biological washing powder and wash down with that, and then wipe with surgical spirit to remove any traces.

I will give surgical spirit a go I have'nt tried that yet, I havent used anything containing bleach but have been using jeyes fluid maybe that is having the same effect on him.

I think the problem with marking is that once  it becomes a habit even if you have him castrated the problem could still continue.  Perhaps have a chat to your vet about having the castration injection (sorry can't remeber the name) to see if that helps before having him surgically castrated.

Scent marking is a problem that is difficult to combat. Once in the habit of doing this dogs seem to persist no matter what you do. I found the surgical spirit worked well after cleaning area with the bio powder but they just tend to move onto a different area mark. The only thing that works with mine is to restrict access to the favourite marking grounds eg kitchen door frame and hallway. You could try keeping him on a longish lead tied to you in the house so you can see what he's up to at all times and get him outside when he sniffs around and looks like he's going to wee. Or you could crate him when you can't watch him. The key to solving this I have found is the longer they go without scent marking the more likely they are to stop. So it's worth the effort of leashing and crating so he doesn't have the opportunity to do it. If you can get him to go 3 clear months you may be on the road to success. My dogs used to mark daily but now it's a rare occurence and the minute it starts up again they are back on the lead and under restricted access again until I feel sufficient time has passed that they can be trusted again.