To remove dog urine odor from your carpet you can sprinkle baking soda onto the carpet where the dog urine is.
Allow the baking soda to sit overnight for best results and then put some vinegar onto the baking soda and allow it to work for 20 to 30 minutes.
Next take a carpet cleaning machine or upholstery cleaning machine and add some vinegar to the machine and then suck the dog urine and baking soda out of the carpet.
That should clean the dog urine out of the carpet and also remove the dog urine odor.
You can also go to pet stores or even Walmart or online and buy some pet urine odor neutralizer that does an even better job at removing the odor of dog urine from the carpet.
Clean the carpet as normal and then pour or spray some dog or pet urine odor neutralizer on the carpet where the dog urine is and allow it to sit for 20 minutes or so.
Then use a carpet cleaner or upholstery cleaner machine to suck the carpet clean and remove the pet urine and odor neutralizer.
You can also spray some more pet urine odor neutralizer onto the carpet to help keep the smell away.