General breed question, Brahmas

[Chickengene]

InIs this the normal growth rate? Or did someone play a little loose with the term "day old chicks"?
Orpington pulletts with two Brahma pulletts and one Brahma cockeral. The Orpington pulletts are twice as big at 10 or 11 weeks.

 

[The Moonshiner]

What do you mean with "a little loose with the term "day old chicks"?
Are you thinking they were sold as day old but were older?
Its pretty obvious if a chick is a day old or not by feather growth. Not sure how you wouldn't of known.
They look pretty normal as far as I can see. Orpingtons surely don't look twice as big.

 

[Chickengene]

What do you mean with "a little loose with the term "day old chicks"?
Are you thinking they were sold as day old but were older?
Its pretty obvious if a chick is a day old or not by feather growth. Not sure how you wouldn't of known.
They look pretty normal as far as I can see. Orpingtons surely don't look twice as big.

This is only my second flock of baby chicks. Seemed to me, and admittedly I did not give them constant attention, it was a week or two before I really noticed feathers.
I am also by, no means any kind of photographer, lol. But in person the difference is; to my untrained eyes; quite different.