peeing

Question
My 6 year old male Great Dane has started peeing in my house.This has been going on for a few months now.We never had a problem before.He goes outside when he knocks on door which is about 10 times a day.
We do have a female Dane who is spaded.
Rambo is not neutered.He is ruining my carpet!!!

Answer
When a 6 year old male starts to pee there can be a few things going on:
1) He may have a urinary tract infection
2) Because he is not neutered he may just be marking in your home if that is the case he needs to get neutered or he will continue to do this. Males that have testosterone running through their body for no reason scent mark to claim their territory(being your home).

If it is not one of those two, it may just be a behavioral issue and I would consult a trainer in your area to help you with the issue.

I apologize for taking so long to answer, I usually do within a day but having a newborn doesn't allow me the time to sit down at the computer these days...