Runny poop?

[quails3]

I have some chicks and they seem fine. They're super playful and up(ity), but the ones that are one month old have runny(diarrhea(e)) poop
But my two month olds have normal poop. What could be the problem? I don't think all of the younger chicks have it , but maybe four do. Do chicks normally have this?
But I mean they seem fine. I just want to know if I can help them in any way

 

[oldhenlikesdogs]

Poop consistency tend to be based on diet and water intake. I generally don't worry about it unless the bird is acting unwell.

 

[quails3]

Poop consistency tend to be based on diet and water intake. I generally don't worry about it unless the bird is acting unwell.

Thank you! None of them are acting unwell, but I'll still keep an eye out.