Thanks so much for catching that
@carol5208 . I honestly would hope for it to be something as simple as developing MBD and just a light change. Honestly it is so much better than a possible neurological illness. Have you had a recent x-ray of Apollo?
@Nagyb honestly, I know you said he checked out ok, but that was several months ago and it can develop slower sometimes. MBD is more treatable than a lot of issues I have seen, and I have had some great success with some rehabilitations and rescues with some severe cases. Might be worth looking at again.
As far as insects, have you tried any slower moving flies for him? I have noticed black soldier flies are super slow movers and the larvae are super high in natural calcium if he will eat them.