After the inadvertent little mishap that involved Montgomery's tribble, and alcohol (made of grain), wherein the Red Dragon Inn's commons quickly became a veritable tribble breeding grounds, the decision was wisely made to...

Make it someone else's problem. Namely speaking, Starfleet's problem.

Scotty had some issues with this universe's branch of Starfleet, not the least of which was because one Bly "Foghorn" O'Shea decided to kidnap him for a party. While he had been rescued, and came out of it all right, the resulting emotional backlash had made it entirely not worth it. Therefore, when Montgomery's tribbles decided to start breeding and taking over the commons, and the Federation Embassy in the Stars End Spaceport didn't respond to the priority one PADD message, Scotty thought to take the issue right to their doorstep.

Which basically meant, he and Montgomery crept in, found the nearest Starfleet cargo shuttle, and proceeded to leave a box of tribbles in its cargo bay.

Truthfully, they made it look easier than it was. What it actually involved was a lot of sneaking, tinkering and security bypassing. It involved them crawling on their bellies to get under weak points in the sensor nets, and it involved them parsing technology that was a good century newer than they were. But, though it took a number of hours, they did indeed manage it.

By the time that Montgomery and Scotty crept back out and then took Scotty's horse back for the main city center and the Red Dragon Inn, there were fifty-seven tribbles in the cargo bay of that Starfleet cargo shuttle. Only one remained out — the original Snowball.

They had also, wisely, grabbed a box of Starfleet ration protein nibs.

What they did not realize is that one tribble had escaped. And not only escaped....it went and allied with the infamous Stew in the Red Dragon Inn's kitchen.

Their tribbles....er....troubles were just beginning.