Both of my dogs are 100% potty trained to go on wee wee pads. Codie was FULLY trained at 4 months - it was amazing. He's a Maltese and I heard that they're easier to train. In my case, he was A LOT easier to train than my Yorkie, Katie. She is FINALLY 100% trained at 11 months (almost 1 year actually because her birthday is next month - August 5th). But they're so good about going on their pads now. I'm a proud mama!