So you definitely know her protect his mom which is great because it really shows how much you care.
The reason I ask why how many u have is because it would have been a good reference point in showing you examples that all the poops different. I got 21 chickens. And sometimes they love to sit on my porch and poop on the concrete( I hate it when they do that and consistently try to shoe them away). All the Poop moreless looks different. Really just depends on what they eat and how much they exercise.
So here's a few times where you should worry. The poop is straight bright red which typically indicate blood in the lower intestine. Black poo like really Tary Black typically indicates blood and upper intestine or like stomach area.
Also when you only have a few chicks you're consistently looking at all their activity and what they do and you kind of start over analyzing.
If you truly want us to double-check upload a video of your chicks doing some regular activity. So you have three older chicks and how many new chicks do you have? I'm not a fan of medicated food I think it's something you could use if you got a flock of 50-100 Birds. But if your Birds aren't interacting with other birds and you don't have too many of them and you got them from a good Hatchery you're probably don't need to give him medicated food. But that's just my opinion.
