Koi fish ID?

Hey guys. I just bought a new batch of 100 feeders to replenish my feeder tank, and I found two little fish a little different from the others. They are all about 2"-3" long, but those two have half their body white instead of the usual goldfish orange. Now I never saw a feeder like that, and was wondering if maybe it could be another specie mixed up in the feeders...say like a koi, since the colors remind me of koi.

Here's the thing, I don't know nothing about koi hehe...so could anybody please tell me what to look for in the fish to check if it's a koi or just another feeder fish? I would hate to feed baby koi to my SH...I would wait until they grow

Thanks!