I agree with everyone else. Consistency is key. When Bentley was very young we used a playpen for potty training. We would take him out and if he pottied, we would let him stay out of his playpen for 30 minutes of playtime. Then back to his playpen for about 15-30 minutes (in our living room with us of course), then back outside again. This lasted for a few days. They learn so quickly. He figured out that if he went potty outside, he could have playtime. Lots and lots of jumping and excited yelling when he went potty too

I personally wouldn't haven't have felt comfortable letting a trainer take him for that long. They are so sensitive to things and she could very well regress once he is returned to you. Anytime we make a move (military) it seems to take a while for Bentley to settle and be his normal well mannered self again

and he's 2. Consistency, time, and patience