Is there blood in her poop? I don’t see any but my eyes are terrible. If there’s no blood the corid won’t hurt but it may be unnecessary. I might ask a vet to send a fecal sample to see if they have worms regardless. At this age if she’s having issues with cocci then I would be concerned there’s...
Try some probiotics in the water. Leave plain water available too but the probiotics should help. They’re available in most feed stores in small packets that treat a gallon of water. Do that for three days and see how she’s doing. Molting is hard on them. Also, up her protein a wee bit to help...