Suspected coccidiosis

[KatsHerd]

So I have inside brooder chicks that have been fine & well up until yesterday. They are almost 6 weeks old, kept inside still as its extremely hot here to move them out yet.
I had 2 chicks pass, that I personally didn't even notice a change in before passing. It wasn't until a 3rd chick got extremely unwell that I realised it seems like cocci. Runny poo, hunched over look, ruffled feathers etc.
We've never dealt with it up until now. So I'm more so asking if there's anything further I can do.
I've administered Cocciprol into their drinking water as of about 15hrs ago. The 3rd chick unfortunately passed away overnight. I've also treated my outside flocks just to be on the safe side. Is there anything more I can do? None of the brooder babies currently "seem" sick, but the 3rd one that seemed unwell only seemed sick for a few hrs before just dropping.
Their brooder is kept clean, good airflow, fresh water etc. I'm not 1000% sure how they got it. They were purchased eggs, if that makes a difference?

 

[Eggcessive]

Sorry for your loss. I would continue to treat them with the cocciprol for the maximum dosage and time. At 3-6 weeks, coccidiosis is common, and it can reside in their intestines, tracked in on shoes from soil and bedding. Gradual exposure to the organism usually helps them to develop resistance. Here is a good article to read:
https://www.thepoultrysite.com/publications/diseases-of-poultry/206/coccidiosis

 

[KatsHerd]

Sorry for your loss. I would continue to treat them with the cocciprol for the maximum dosage and time. At 3-6 weeks, coccidiosis is common, and it can reside in their intestines, tracked in on shoes from soil and bedding. Gradual exposure to the organism usually helps them to develop resistance. Here is a good article to read:
https://www.thepoultrysite.com/publications/diseases-of-poultry/206/coccidiosis

Thank you so much! If my older chooks were the ones I potentially tracked it in from, would older chickens show symptoms? I'll definitely give that article a read & keep treating!

 

[Eggcessive]

Most chickens gain resistance to coccidia in their soil by slight exposure by 12-20 weeks. Symptoms of coccidiosis are lethargy, standing puffed up, not eating, weakness, and diarrhea, sometimes with blood.