I need a little help with how to discipline my 5 month old pup. At night especially when she is getting tired she gets really cranky like a little kid and she lashes out when scolded. If I tell her no she snaps at the air like she is is mad because I told her no. If she continues the behavior I become more stern with my voice and tell her no. She will snap again and I do pop her on her snout and say no. If it continues she then gets a quick grab to the scruff of the neck and if th!t does not work she gets put on her back until she calmer down, but that usually makes her snap at the air even more trying to get to me. I have even tried to wimper like a pup when she bits and I have even growled at her and nothing seems to work. Please help I don't want a dog that bites or a dog that fears me. I have read a lot of the other post on biting, but nothing gas worked. Any suggestions would be great. Is my pup being a defiant pup or is going to be mean and bite? Help!