Just so you know, you are not alone with this. I went through it as well and now have my grand daughter living with me... There are a couple of things you can do. First, you can go and talk with them and see there reactions to whether you believe they will get the help they need for the sake of the children.
Or you can call child protection, which you are actually obligated to do anyway. The reason for this is because you know this abuse exists and if you do nothing and they find out, you can also be prosecuted....Personally, I had to do something because I could never live with myself if something really serious had of happened to my grand kids. As it is now, they are really messed up emotionally/mentally.
You can only do what you can, then you have to let go and move on and yes, this is difficult but not impossible. My prayers go out to you and your grand children, and being the caring loving grand mother you are, I know you will do what is in their best interest, no matter what this is. Take care Wendy, it is a very difficult situation.
As someone who has seen what CPS does, I can tell you not to bother with them. If you can care for the children, consider getting custody of them. Do keep in mind that no one-year-old has "normal" eating habits, so unless you've had a pediatrician who specializes in child eating habits personally tell you there is a problem after examining your grandchild, you'll have a hard time convincing a court of this.
Also, since it's relatively anonymous here, you might want in the future to give specific examples, in case someone in a non-pediatric but related specialization is reading. For instance, someone who deals with emotional abuse would be much more versed in inter-adult relationships, but could identify trends that are signs of abuse. I will take you at your word about this being abuse, but I will conclude by saying that you do need to be prepared in the eventuality that authorities decide that it is not such a case.
I wish you and your family the best.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.