J.K.
The #1 wrong thing that you could do is punish him. You know that he is having a problem with something. That is out of his control so punishment is not the answer. I believe that there are 1 of 2 things that could be going on. 1 is the new changes in the house. That could be throwing him off a little bit. The other is there are some children (this is pretty common) who grow and their bladders don't grow quite as fast as they do. I wouldn't put him back in pullups. That would give him the wrong message. The only other thing that I know is to sit him down and reassure him #1 that he is not in trouble. Tell him that you want to help him. Ex. I know that you are having a problem with wetting your pants and that's ok. How can I help you? And add questions to that like. Ex. Are you nervous because of the move or are you having a problem holding it until you get to the bathroom? Generally if you give a child a multiple choice question in situations like these things go a lot easier. Hope this helps!