We have a 3.5 year old dog, we followed training when she was a puppy, all positive reinforcement guidelines, she was happy to sit/stay/ fetch/rollover. Over the last six months she has become Barky, and disregards instructions, slowly responding partially, ie moving to her bed incredibly slowly. No longer fetches ball, barks increasingly at noises , the stimulus gets smaller, it is now us sniffing that upsets her,
Do we need to start again at the beginning?