The cat harness is a quest item in The Witcher which is the goal of the Small Problems quest. It has been stolen from the "good" Griggs by rival Griggs (presumably, bad ones) and it is up to Geralt to retrieve it. This information is given to Geralt either by Abigail or the healer, depending on Abigail's fate in the Outskirts.
Once Geralt returns the harness. The Griggs are appeased and offer a four-leaf clover in return.
Associated quest
Notes
- It is possible to completely ignore this item: if a player places strong alcohol in the santon and receives the four-leaf clover before starting the quest, then the player will be prompted to give the clover to Harn after speaking with Abigail. However, the player can still retrieve the cat harness and place it in the santon, despite not being prompted to do so.