I have my baby Kobe, who is 2 1/2 years old and is an angel. Then there's Mia, who is 11 weeks old and has been with us for a week now. I have a little problem, if I don't hold her back, she will put her poop in her mouth. I got distracted yesterday and caught her behind the sofa biting on her poop. I pick her up and say no in a firm voice, but she continues to do it. Help!!!