Just out of interest. My dad is lovely with my dd but will often openly disagree with how I parent saying I am too harsh on her. Being harsh includes telling her off etc. She basically has him wraped around her little finger which I don't mind but I do get annoyed when he lets her run rings around him and expects me to do the same.
When mum was alive she tried to feed dd coca cola
. She was a lovely nanny. I juts think that grandparents have forgotten how tiring and stressful being a parent is and don't get it when we tell their adorable grandchildren off.