thanks for linking to that article; I'd missed it. I concur with your evaluation of it.Best go and see a doctor!
I think they're Morinth's eggs now no matter who laid them.
One needs to be carefull with chicks very early on about ensuring they bond with mum and not with you.
In mainly coop and run keeping bonding to the keeper (I believe they can bond with more than one person/creature) bonding to the keeper can be quite usefull and once of a suitable age most raised in this way become friendly as they mature. For a free range keeping one wants maximum bond strength between chicks and mum, and then tribe, and finally the keeper.
There are many reasons for this most obvious once the topic is considere.
In it's simlest form, when the shit hits the fan you won't be there and the chicks need to do exactly what mum tells them to.
I spent too much time with the juveniles at the field. They're very friendly; partly due to personality.
This is an excellent article that was never going to be popular with most hatchers.
https://www.backyardchickens.com/articles/chick-instructions-on-one-page.71977/