Mini-dachsund behavior issue

Question
My 2-yr old mini-doxie won't quit marking everything he can in the house.  He doesn't pee all over, it is just sprinkles.  He holds the majority of his urine and NEVER poops in the house.  We have the same routine everyday and he is taken out regularly, but the marking is everywhere.  I can't figure out how to fix it.  Please help or send me in the right direction.  Thank you so much for your time.

Answer
Is your dog neutered???? If not, do it.  Unfortunately, testosterone related behavior will not extinguish simply because a dog is neutered, and it takes 6 weeks or more for testosterone to decrease in the body. An intact male (or one neutered after the age of 18 months) always reacts as an intact male, even after neutering.

You need to establish some psychological control over this dog.  Using positive reinforcement training (go to Karen Pryor's web site or read Patricia McConnell Ph.D.'s book on the topic), teach him one behavior (slowly over the course of two weeks) he can ALWAYS (100% of the time) perform for praise and reward.  Once this behavior is acquired (ten out of ten successful trials), ask the dog to perform this behavior (a "sit" is fine, but use another word) for EVERYTHING.  This "Nothing in Life Is Free" protocol was initiated by Deborah O'Farrell, a veterinarian in Britain, approximately twelve years ago, and it works.  He must "sit" for interaction with you (play, being petted, etc.), before being allowed out or taken out (or in), before being fed, before getting treats, etc.  This is a clear signal to the dog that YOU are in control and it will help to assuage his anxiety (at no clear cut leadership) and make him aware that this environment is YOURS and it is not his responsibility to mark it, defend it, and not his territory.

While you are training this behavior, and for a week or so after you have begun the NILIF routine, keep this dog on very long, lightweight training leash (nylon) indoors (only when you are home.)  Observe him closely; a male dog sidles up to an object before lifting his leg.  If (and when) you perceive him initiating this behavior, interrupt it (clap your hands or speak a guttural "NAH!"), then ask him for the trained behavior and reward that.  Consistently preventing him from marking while giving him strong psychological signals that you are in charge (and having him neutered) should stop the behavior.  This will take time, patience and persistence.