My 9 month old dog is marking everywhere and chews up my shoes. I’m thinking of neutering him to fix this, do you have any suggestions?

Dear Sir,

I have used your training videos and advice to start training my doberman who is now 9 months old. We rescued him and had a lot of issue but have worked through most of them.

I tried search for a couple of questions I have on the forum but couldn't find the answers for the following questions.

The dog has started marking his territory. Bad thing is he thinks that he gets to urinate on company when they come over and he almost did it to my son. I was thinking of having him neutered to stop this but don't want to mess up his chance to be a good advanced bite and guard dog. What do you suggested?

Second he is always chewing on my shoes. Only mine and he waits till I am not looking. He is never out of the kennel unless he is at my side but he is smart and quick. He knows when you are watching him so I can't catch him at it. I can pile everyone's shoes around him and even go to the other room to peek around the corner. He won't touch them. I usually keep my shoes put away for this reason. Now and then I forget or they are muddy and sit by the back door (part of the kitchen). At a loss for this and running out of patience with him over them. Suggestions please Sir?

Again I have used your videos and training aids and love your system. It has made a huge change in the dog since we first got him at 6 months old. I have told people what I use when they notice how much he has changed. So thank you so much.

Justine