You'll unlock this achievement in the process of going for this one, so thanks to codomojump for the solution there
You'll require the Booboo-B-Gone
from the office in Bernard's timeline (the office is behind the desk in the main foyer).
Once Laverne is able to explore freely without being sent to the kennel, leave the building and head to the right, where you will see a cat trying to get under a fence. Use the Booboo-B-Gone
on the fence, watch the hilarity unfold, and pop goes your achievement.