Help! my baby chick is weak and sleepy emergency

[Hassan123123]

He is I think 2 to 3 weeks old or maybe smaller or bigger a week ago he was running around but now he just sit downs and don't run or walk he eats and drinks but then he just sleeps again I don't know what happened to him

 

[Wyorp Rock]

Can you post some photos of the chick and it's poop?
Where are you located in the world?
What do you feed?