new chick question

[6CHICKS141]

So a couple of days ago I got my 6 araucana chicks! I have some worries though. One of the chicks is bigger then the rest, and I know they are still very young, so does this mean anything? And another one is noticeably smaller, a little skinnier, and is VERY calm, always sits in your hand, but her eyes are bright, she walks around, joins the others, and is perfectly healthy. Is being this small mean something? Does it mean that she needs any special attention?

I'm such a worrier

 

[sumi]

Hens don't always lay the same size eggs, so the chicks may be smaller or bigger because of that.

I have two batches here who were born on the same day with two different moms. Both batches ate the same stuff, free ranges with moms... one batch's chicks are bigger than the others. They are all healthy and happy though. Which is the most important.