HELP!!! dog wont stop "marking"

[patrick0685]

Neuter him. It may help the marking issue, and it certainly decreases his risk of some life-ending diseases.

that is mostly vet propaganda and depending on the age of the animal could be way worse for them...just fyi

[TheGrey]

Neutering isn't some big vet conspiracy. Not only will it prevent him from running to every female dog in heat, it will assist in training him to sop marking his territory. It will also help prevent testicular cancer. It won’t make him get fat and slow him down; he’s already got a healthy amount of testosterone in his system.
Whether you take him to the vet’s (which I would also recommend, because if his urine is especially strong, it could indicate a medical problem and it’s best to eliminate that worry first) or a dog trainer, you’re going to want to clean up what he’s added to the house. Male dog urine carries many scent tracers; he’ll return to the spots that he can smell. Get a portable black light and pick up some stuff called “Nature’s Miracle.” They sell it at PetSmart. There are several different varieties; get the strongest stuff that will remove biological markers. Not the orange Oxy-clean stuff- it’s a white bottle with red text. Pick up the gallon jug. You may think you won’t need it, but you will. Darken every room in your house, one at a time, and use the black light to show you where he’s marked, follow the instructions on the bottle and eliminate those scent markers so he doesn’t confuse the area with his bathroom or his doggie version of a cell phone.