Well by normal I mean that it's naturally occurring, and not a sign of illness or anything. I just didn't know that they develop yellow spots as they age, and I'm hoping someone would be able to confirm it, but I don't seem to have anyone to ask. Everything else about my little guys is fine, they're plenty active, still eating, pooping normal (not runny at all), no signs of abnormality. It's just these yellow spots that have popped up, and I don't want to go to the vet and pay 40-80 dollars just to be told, yes those are normal for H. cinerea. Thank you for the reply though CJ, it further makes me think that these yellow spots are equivalent to the normal white spots on RETF's and WTF's.