I agree with lady stardust here. Your little granddaughter has had a lit to deal with, her little world had been turned upside down and she can't handle it, I can relate to that, as my mum told me recently, that when we moved house I was 4 years old and had also just started school, apparently I stopped eating for quite a while, and I refused to eat school dinners. The dinner ladies informed my mum that they were quite concerned, as I cried every time I was given school dinner and refused to eat any of it. I eventually settled but I can imagine the concern for my parents. It was non judgemental kindness that got me through it, any discipline would have made me worse, so please bare with your little granddaughter, she's doesn't understand the turmoil she's been thrown into, nor can she process it as an adult can. When my grandchildren seem distressed about something, I tell them it's ok, and explain in a way they understand, and just be there to allow them to air their feelings with no judgement. It's not about you. They need patience and kindness.