Stuffed Rabids

Has anyone got a clue about what these are for, or even where they came from?
Recently discovered a stack of 75 in my star menu, and if you click on them, the mayor's house lights up so they seem to be some kind of resource (or collectable perhaps).
Loathe to try and add them though, seeing as there's no corresponding item in the stores' list, don't want to cause a crash or worse.
Wondering if maybe one of the "foreign ship" buffs has somehow corrupted, there's at least 1 of the quests there to make 75 of a particular item.
It appears just after some of the golem buffs and before the Assassin, pretty close to the Xmas scenario buffs, but doesn't appear to be related to them as text doesn't mention impatient/unhappy child, but does say they make everyone happy.

https://en.tsomaps.com/tso-item/buff...ntMarketBuff2/

If it's that, it was for the event island's (sector 5) xmas market quest for Christmas Event's Spreading the Message quest.

Thanks, that's ringing some bells.
They're the ones alright, icon and narrative are identical, just no idea why I've still got a pile of them, must have either built the wrong ones or got a bit heavy with the mouse somewhen.