Grid Status Report says:

Rolling restarts on the main Second Life server channel will begin momentarily. Please refrain from rezzing no copy objects, making inworld L$ transactions and please save all builds. We will update this post when the restarts have completed.
http://status.secondlifegrid.net/
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The sim with my roos is being "updated" now. There have been troubles before when they've done this. I wouldn't recommend picking up meeroos or rezzing nests until they're done.