I know you probably don't want to hear this, but have you considered calling child protective services? If they are not caring for the child, that is negligence. The courts can force them to take parenting classes.

Start documenting all the times the parents are not caring for her. Getting the child away from the parents will be a tall order, but not impossible. Only thing you need to consider is what it will do to your relationship with your daughter.

Sending hugs. I watched my ex sil deal with this type of thing for years. It's no picnic for anybody, least of all the kids.

sorry to hear this, not a clue what to do

It's imperative for your daughter to take her medications DAILY. Do not miss a day. This will help for starters to control her mood swings!

I know you don't want to get your daughter in trouble, but I agree with hurtandhealing that it is your granddaughter's welfare that is most important.
Calling Child Protective Services is a big step for you, but it's the only thing left for you to do. If you can't take care of the baby yourself, since you work so many hours, is there another family member who could become the foster parent, so you can go to CPS with a plan that allows you to maintain contact with your granddaughter. I know someone who did this, but I don't know the laws in your state.
Sadly, your daughter has to suffer the consequences of her poor decisions. You can't keep saving her. Concentrate on doing what is best for you and your granddaughter.
((hugs))

I am so sorry to hear you have more put on your plate. I am sure you had gone over all of this with her during her pregnancy. Evidently she decided to keep the baby. She has to be made to accept and do what is her and his responsibility. You may help or ask from other family members,including his to help,but you have to take care of yourself. This is your grandchild not your child. You have to remember this and not take on any guilt about this. You have to be so exhausted with all this going on let alone that amount of work hours and this stress. I would check in if these parenting classes are offered to assist your daughter first to help them. There has to be help for this. Perhaps even her doctor has suggestions as this has to came up in others. Don't be afraid to ask for help. Is your ex of any help? This is his daughter too. Perhaps his or your siblings or parents? The parents of the boyfriend/father? Church members? Friends? It is a situation that perhaps takes a village to help. You have to get relief and she needs to learn how to do this if she wants the baby. Perhaps others can "babysit" when needed.
This is hard for all but particularly you. Please know you will definitely will be in my prayers. We are there for you and come to this site to vent and get support. This may not be a divorce questions but that does not matter as we "met" you and this is to support you with this complication and addition to this. God Bless You.

I have been with them since the baby was born. The first week I slept over their apartment, at their request (because I didn't want to impose) and spent the nights so they could sleep and be with the baby during the day while I work. I bring dinner 3 times a week and I take the baby on Fridays to spend the weekends with her so they can get some rest - but they still feel that it is not enough and no matter what I do it is never appreciated - this has been my dilemma, which brought me here to DS. My stbx (married for over 2 decades) and I disagree on how we raised our daughter and it keeps getting worse. I have no peace. "

After reading this from the your response to the other site, I am glad to see they have their own place. You are doing all you can and I again say Ask others to help. {{{Hugs}}}