Little Kitty, Big City

Find all 4 ducks:

Arcade - climb and use the pipe to reach the lever.
Store - pull the fan
Washer - run into the red button
Climb from behind the grocery store - pull the box on the vent.

Full guide below:


Timestamps:

00:00 Intro + Advice
01:10 Story 1/2: Who Needs Cash? and Snack Time Achievements + Hello Everyone 1/15 + Neighborhood Hero 1-3/24
05:26 Story 2/2: And Stay Out, Decluttering, Fin-tastic! And Home Sweet Home Achievements + Neighborhood Hero 4-6/24 + Hello Everyone 2/15 + Capped Crusader 1/42
13:01 Quack Troops Achievement + Hello Everyone 3-6/15 + Neighborhood Hero 7/24 + Capped Crusader 2/42
17:45 Surprise, Trip Hazard, Cat-Like Reflexes, Bird Botherer Achievements + Hello Everyone 7/15 + Neighborhood Hero 8/24
20:16 Killer Kitty, Give a Dog a Bone and Dumpster Diving Achievements + Hello Everyone 8/15, Neighborhood Hero 9,10 /24 + Capped Crusader 3/42
25:05 World Traveler Achievement + Hello Everyone 9/15
27:38 Fruit Fall Achievements Hello Everyone 10/15, Neighborhood Hero 11/24
28:54 Checkmate, Big Kitty, Little City Achievements + Hello Everyone 11,12/15, Neighborhood Hero 13/24
30:49 Cat Napper Achievement + Hello Everyone 13/15, Neighborhood Hero 13/24
35:15 Sticky Business, Smash Hit Achievements, Neighborhood Hero 14/24
42:23 Splish and No Parking Achievements + Hello Everyone 14/15 + Neighborhood Hero 15-22/24 + Capped Crusader 3/42
47:52 If I Fits, I Sits Achievement
49:49 Industrial Artist, Hello Everyone 15/15, Snap Happy and Papa-cat-zi Achievements + Neighborhood Hero 23/24
51:34 Back of the Net and To Me, To You Achievements
55:14 Rub-A-Dub-Dub and Neighborhood Hero (24/24) Achievements
58:33 Fat Cat and Litter Picker Achievements
59:58 Capped Crusader Achievement
1:11:35 Can’t Stop The Feelings and What Sweet Music Achievements
1:12:12 Cult Of Purr-sonality and Local Celebrity Achievements

To start this quest, you need to speak to the mother near the shrine and pond at the center of the map. Then run around town to find her four ducklings: Arcade, Laundromat, Rooftop of Mayor's Shop, Southern Grocery Store

Here is a full video walkthrough with timestamps in the YouTube Description, including all duckling locations!