I would treat for both Coccidiosis and worms.
@Banana01 what are the long and short term side effects when using Corid (Amprolium)?
Ideally a fecal float would determine of cocci is present and also worms. Some people do their own fecal floats at home. Since no fecal float is available, worm treatment is just easier to do compared to treating with corid.
De-wormer
Individual treatment, you dont need to treat the whole flock
One time treatment possible
Egg and slaughter withdrawal periods known
No drug interactions
Corid
Indicated solely for entire flock treatment and removal of fresh water sources.
Drench, 5-day, and 21-day treatments
Zero forgiveness for incorrect usage and improper dosage
May need thiamine restart after treatment
Best used as a preventative before cocci outbreaks
If you are looking for side effects, the side effects of cocci outbreaks is worse than any side effect of corid. But op already treated for cocci previously, so better to eliminate worms as any possibility or else they are just going in circles.