Re-Training?

Question
My Yorkie is 2 years old and recently has regressed.  Its like he was never potty trained in the first place.  There has been no changes in his routine or schedule, but is all the sudden making messes in the house! What do I do????

Answer
I would first have your vet examine the dog (may require a urine specimen) to be sure there is no medical reason for the behavior.

If the vet gives him a clear bill of health, then the second suggestion would be to re-introduce all the basic housetraining techniques; a refresher is included here for you.

http://www.ddfl.org/behavior/retrain-dog.pdf          
http://www.dogstardaily.com/training/housesoiling
http://www.marinhumanesociety.org/Behavior/Handouts/Housetraining.pdf