Is their poop normal?

[007Sean]

The dark green color is probably coming from the grass. Otherwise looks normal.

 

[shelbyw]

It could be from grass, dirt and grubs. I don't see anything that concerning, poop can be all colors depending on diet.
I would make sure they have a source of grit too

I add wood ash to my run when I have it - I see pitch black poop for many days afterward because they also eat the charred pieces.

They do have a grit source thanks! Mine love to eat the ash I use for their dust bath area as well

 

[Katlinalyssa]

Do 5-6 week old chicks need a grit source? I am feeding Purina chick medicated feed. One of mine seemed to have a cecal poop today. It was a brownish red but it wasn’t bloody looking.

 

[Wyorp Rock]

Do 5-6 week old chicks need a grit source? I am feeding Purina chick medicated feed. One of mine seemed to have a cecal poop today. It was a brownish red but it wasn’t bloody looking.

imho, yes.
Chicks need grit from day one even if they are only eating chick starter.
Chicken have 2 types of poop - cecal and "normal". They will have a cecal poop about 1 out of every 8-10 "normal" poops. So you should be seeing cecal poop throughout the day.