First of all, let me say...hi. I wanted to introduce myself, since I am new to this site. I just recently got my mm card, and stay within the guidelines, but I am confused about the scale issue. If your a caregiver, wouldn't you need a scale to weigh their stuff out? I understand if your just growing for yourself, but what if your a caregiver to a couple different people? How do you know your giving them the right amount?