Small/ possibly stunted Americauna chick?

[mountainhen88]

I have five chicks of different varieties that are all seven weeks old. My Americauna chick is smaller than the others and I don't know if she is sick or has some other type of problem. She has all of her feathers, just is smaller than the others. The other chicks have only recently outpaced her in size, and she moves around, eats, and drinks just like all of them. She is the chick circled in red below. Do you think she is stunted or has a parasite or sickness?

 

[HKG]

@dawg53 @cmom

 

[dawg53]

As long as she's eating, drinking, and acting like a chick(en) should, there's nothing to worry about.

 

[Ilovemychicks08]

I have an Easter Egger that has been like that since she was a chick. She is doing well and growing a little. I noticed she grows a lot slower than the other birds.