I need some advice. My 1 year old daughter was getting into CD's on a shelf and telling her No was not working so I smacked her hand and told her no. Not hard but enough to get her attention. That didn't work either. She hit me back and told me no. When she gets into stuff telling her no isn't working anymore. She listened so well a couple days ago. I don't know what to do about it. Can being around older kids that don't listen be affecting her behavior? Please help.