Noisy Chick

I have just acquired two week old chicks today. Set up a homemade brooder. The seller didnt have a temp for me. So Ive set the heat lamp at 35 in the corner, so that they can get closer or move away.  Both are eating, pooing and watering fine. However one of the chicks is so loud, Peep (well more loud cheeping than peeping)  The have both crashed now in the corner. I didnt realise they were so loud.  Is this normal.

I was told they were both female but am thinking one is going to be a cock.  On closer examination, one has a comb and the other nothing??? ie one looks like a klingon and the other one is flat.

I also didn't realise they crash when they go to sleep... thought they were dead :S Im wondering if the sellers children played with them alot as they seem to shut up when you go to them.  Anyway all is quiet now they are nappleting.

Any advice please and is this all normal

Pics

Im sure one of my kids has a cuddle toy somewhere I shall tray that thank you x

 

But is the noisy one any quieter? 

It will get pooped on, but little blue bunny is still fine after being pooped on several times!

Another thing I saw in Katie Thears starting with chickens book was she divided a brooder box into 2 compartments.  the warm one with the heat lamp, and a cooler section with their food and water where they could go if it got too hot.  In the cool area she suspended a mop head and inch or so off the bottom of the box, and the chicks were going under that like they would a mummy hen!