No
For pet dogs, early neutering will stop marking behavior in the majority of dogs. Neutering at an early age can prevent the habit forming. For older dogs, neutering may still have the desired effect but marking in the house may have become a habit that you will have to break. In dogs neutered at a mature age, the marking may have become a learned, habitual behavior and will need behavior modification. Also, if you have an intact (unspayed) female in the house, this may add to the difficulties of breaking the habit. Spay (or neuter) first. Spay or neuter your dog as soon as possible. The longer a dog goes before neutering, the more difficult it will be to train him not to mark in the house. Spaying or neutering your dog should reduce urine-marking and may stop it altogether. But if he has been marking for a long time, a pattern may already be established. Because it has become a learned behavior, spaying or neutering alone won't solve the problem. Most dogs that are neutered or spayed at an early age do not mark in the house. Prevention is better than cure. Male dogs that are not castrated are more likely to mark than castrated dogs. Although male dogs are more likely to mark urine than females it is not unknown for a female dog to scent mark too. Most dogs that do mark begin marking when they reach sexual maturity (depending on the size of your dog) between 6 months to a year old. Small breeds tend to mark more than larger breeds and intact males tend to mark more than neutered males or females. Neutering MAY help with the marking-but it may not. They will mark outside regardless. But in the house, since he has only been there one day, he may stop in the house too. You could let him in for a while at a time and really watch him and if he starts to mark-you know you say NO!! and work with him a bit.
http://www.dogchatforum.com/dog-marking-inside.htm http://www.paw-rescue.org/PAW/PETTIPS/DogTip_Marking.php http://www.humanesociety.org/animals/dogs/tips/prevent_urine_marking.html http://www.dogchatforum.com/dog-marking-inside.htm http://www.thedogtrainingsecret.com/blog/stop-male-dog-urine-marking/ http://www.dogster.com/answers/question/does_neutering_a_male_dog_stop_the_frequent_marking-24287
does neutering a dog help with marking