An old man in Kakariko Village needs help finding his cat, but the Cat Clothes were already purchased from the shop.
Where to Start the Quest
Talk to the old man northeast of the well in Kakariko Village to start the quest.
How to Complete the Quest
Talk to the girl in front of the Kakariko Village shop. Then go to the northeast windmill in town and create a Grilled Fish echo near the cat. Then create a Holmill echo where the cat was sitting. The girl will give you the Cat Clothes.
Then wear the Cat Clothes (go to the Equipment section of the + pause menu), and talk to the cats in town. Eventually a cat tells you to talk to the cat on top of the west windmill. You can jump on the lower trees east of that windmill, then use a table echo to jump onto the higher trees, then create stairs out of a couple of old beds to reach the roof of the windmill. Talk to the cat there.
Go to the east entrance of Kakariko Village and go along the dirt path to the east. Look for the cat on top of a tree. Then use echoes to reach the top of the tree. Talk to the cat while wearing Cat Clothes.
Go back to town and talk to the old man to complete the quest.
Quest Reward
You get 10 bunches of Refreshing Grapes for completing the quest.