I checked on my chicks this morning (aged 3.5-5 weeks or so) and noticed one of the Silkies had a bit of blood on his foot. I picked him up and as I did a big glob of red dropped off of him. I checked him all over and couldn't find anything wrong with him that would cause it, so I checked the rest of the birds wondering if he had it on him from someone else. Then it occurred to me he had probably pooped it, and I scooped up a bit of poop from the brooder that looked suspect and it was a bit red too (though not as obvious as the one that had dropped on the floor).
The other chicks (not the Silkies) all went outside for the first time on Friday. They were out for about 10-15 minutes. My older chicks have never had problems being outside and none of my chicks are on medicated feed. The Silkies haven't been out at all. Everyone else is acting normal, and the poop in the brooder that was red looked normal other than having blood in it. It was hard to tell if the one on the floor was normal because it had dropped from so high up.
And at the time I wasn't analyzing poop but freaking out about coccidiosis or something. The Silkie in question has always been very calm and quiet, so it's hard to tell if he's lethargic or not. He was spunky when I picked him up to examine him though and peeping to go back in the brooder.
I gave them a small bit of homemade yogurt yesterday mixed with oatmeal and a few other grains. It's the first time they've had that. Could that cause problems?
What other signs do I watch for with Coccidiosis? Can I get medication for it over-the-counter (I'm in Canada)? How much of an emergency is it? (Like, if I do see them starting to act droopy and lethargic, do I still have time to treat them?)
The other chicks (not the Silkies) all went outside for the first time on Friday. They were out for about 10-15 minutes. My older chicks have never had problems being outside and none of my chicks are on medicated feed. The Silkies haven't been out at all. Everyone else is acting normal, and the poop in the brooder that was red looked normal other than having blood in it. It was hard to tell if the one on the floor was normal because it had dropped from so high up.

I gave them a small bit of homemade yogurt yesterday mixed with oatmeal and a few other grains. It's the first time they've had that. Could that cause problems?
What other signs do I watch for with Coccidiosis? Can I get medication for it over-the-counter (I'm in Canada)? How much of an emergency is it? (Like, if I do see them starting to act droopy and lethargic, do I still have time to treat them?)