My biggest concern in whether or not keto/lchf is ok for her is not about her missing out on grains and sugar, it's about her being able to store and use fat she needs for healthy development. An adult who's already developed probably has somewhat different nutritional needs than a child who is growing every day, so I want to make sure I'm not putting her in a place where she's burning bodyfat instead of getting what she needs for brain development, if that makes sense? I'm overweight, I need to burn stored fat. She's a skinny mini and I want to make sure she gets what she needs to grow. She's never had candy and she drinks mostly water, with very limited and watered down juice. She gets an Oreo every once in a while. She does like fruit so she gets that regularly, and she eats some higher starch vegs like sweet potatoes. She generally eats what we do, and we don't force a clean plate. When she's done, she's done. I also let her snack on Cheerios and goldfish, but not to excess. We may stay on full fat milk long term, or only drop to 2% at lowest. So far she seems to be still growing and doing well, but we've had issues since she was a newborn with her gaining enough weight for her height, so I obviously want to be meeting her needs.

@KnitOrMiss Thank you, it's good to hear we're on a good path with her. She's a good eater in general, and not very picky, so I'm fine with continuing to feed her this way as long as it's giving her what she needs to grow.