It's likely that your number 3 child is both the smartest and best looking. Not sure what that has to do with diet but it can't be a coincidence

I have two, both adults now. The first one, if she woke up early and I was still asleep, would politely come over and say that she was hungry.

The second one, though, she was a scavenger. I woke up to her crunching on something. She was eating pistachios -- shell and all!

Kuddos on the big family, such an accomplishment. I must note, the first strategy is better for their brain tho, actually, I dislike reasoning around the education (I count feeding in it as it's extremely important to develop the brain) about what's fine and not what's best, because it's a slippery slope where you feel that small actions don't have such an importance, but after all it's the compounding of small (and better) actions that matter the most to improve intelligence and other aspects of a future adult. It's like sending your kids to a public school, sure, it's "fine", but let's not say it's optimal and it does have an impact in the end.

I have a 2-year old daughter so I can relate in part, she just joined a pre-school now (breaks my heart to drop her) and same as your #1 - top notch nutrition, supps, probitiocs and so-on (deeply studied & argued) and chef level taste, never had once something in her mouth that isn't vouched :p

Chose breastfeeding entirely for the first 6 months (better for their brain as per my knowledge), then introduced solids progressively, I'm super grateful to be in the AI era at the same moment I've had my daughter because it allows me to study extensively everything regarding children.