@sarahcarlene84 Not really fair. I'm a grandparent to a beautiful 2 year old and a handsome one month old. I'm lucky to get to watch them a few days a week.
I've never once criticized my daughter or son in law for their parenting. They are excellent parents and I tell them both that regularly. My grandchildren are very lucky.
If I notice something is off with one of the children, of course I mention it. This could be just being a little tired, to seeming to be coming down with something, to food concerns, to behavior.
My daughter and son in law respect me enough to take my concerns seriously. I respect them enough to let them always take the lead on what should, or shouldn't, be done about it. Both my daughter and son in law have occasionally asked for my advice and I am happy to give it when asked. Mostly, they already know the right answer and just need a little validation.
Not all grandparents are controlling and can't be satisfied. Some of us are valuable members of our children's and grandchildren's lives, helping to be a village.