I have 19 chicks and the ones in this pen are between 5 and 8 weeks old. I had them on medicated starter until the second bag ran out a few days ago. I switched to pullet grower at the advice of the feed store person since about 60% of the chick starter was turning to waste dust. Today I saw two spots of just blood and in one corner a tiny poop covered in blood. I noticed one chick who seemed lethargic but she perked up to normal as soon as I refilled the food trays. I checked her first and sure enough found small traces of blood near the vent (white feathers made it easy.). Is coccidiosis unusual at this age? My feed store doesn't open for another hour but I'm heading right over to pick up Corrid. I've separated her out into a dog kennel but I know the damage is probably already done. Anything else I should be doing?