My girls are 7 months, and recently this hair pulling has gotten worse. They both tug on their hair really really hard while they're eating (bottle). Tonight my oldest twin pulled her hair so hard she pulled off the bottle in horror and started to scream! I have tried holding their little arms down while I feed them but they get so mad when I do that that they won't eat, they'll cry.... what do I do? I am afraid it's a sign for something more serious? I know they feel pain because they have had ear infections, teething pain and I know Maisie hurt herself with the hair pulling tonight... what could it mean and how can I stop it?