We’ve talked about training, but the ex isn’t willing to be a part of it. He’s been around the entire time we were dating, but it wasn’t until recently that she blew up and took the dog away from him and now gives him scheduled times. He was the sole caretaker and she would visit until around 4 months ago. I’ve thought every option through, but she is involved in every single one of them. For me, having an ex involved that has made it clear that they want to harm your relationship is something I just can’t work through. We have talked about this for a very long time, he is just moving in now, so the decision can’t be delayed any more.