My new puppy bites, like every puppy. We were doing the yelp and shun and the instant muzzle. I thought she was doing good. All her bites were shorter and softer, and all I had to do was lightly muzzle her with my hand and she would lay down, ears flat and look up at me. But while scrounging the internet for any help I could get, one website said do not correct biting until after 14 weeks. I've never red this anywhere else and was wondering if it was true, any help?