Hi - new member, with a new addition. She is a 15 week old welsh collie. She is bright, alert, full of adventure and confidence most of the time.....typical puppy. She seems much more "mouthy" than I can remember my other puppies being and also seems to see nipping as a bit of a game. I have followed all the advice to "ouch" and withdraw from playing for a minute consistently, but she doesn't seem to be getting the message, and if anything, the behaviour seems to be escalating. Perhaps it is nearing burnout and I just need to persevere a short time longer? I am not new to dog owning - have had dogs my whole life. I did have one very difficult , challenging and very aggressive dog for 4 years who was, surprisingly, a golden retriever. This did not end well and, despite having had another retriever collie cross subsequently, for 16 years, the memories of the bad experience are perhaps making me more anxious about our new arrivals behaviour. Any advice/encouragement much appreciated!