I've been poking around on the sheep server trying to figure out how certain parts of the sheep generation process work, and I've noticed that about half the sheep IDs just report 'access denied' when you try to view their status pages, like 5536. You can still fetch the spex file from the server, but it contains 3 sheep instead of the usual one or two, all wrapped in a <gen> tag that references an earlier, seemingly unrelated sheep id.

What are these mystery sheep, and how do they play into how the sheep server operates? Are they just placeholder sheep used for HD rendering? Would appreciate more info. Thanks.