Ah, they should be light Gray or white with gray patches.
Most farm stores have a way you can add your order of chicks with their order, it will be much more sure than hoping they show up as it's random what feed stores get.
The hatchery that you order from should have them. can't reccomended getting birds locally due to disease.
Splash anything will look very similar as chicks though I'm mystified as to why you need pics, exactly.
Severe coccidiosis can cause long term issues however they have to be at deaths door for a while and it's very, very rare.
A.i works by skimming information from non copywrited sources, mostly Facebook . And Facebook is hot bed for misinformation.