While the mallard family is following Chump through the city, they pass a bunch of balloons. One of the balloons is the unicorn from the Despicable Me movies.
While almost all the humans in this movie (including the antagonist - the head chef of The Ciguapi) are non-verbal, only one female has a singing part: Mon Laferte performs "Survivor" in the Salsa Tuesday dance sequence.
The tractor at the duck farm has Lux written on the side, which is a measurement of Illumination, the name of the animation studio.
This is the first project Danny DeVito and Carol Kane worked on together since being regulars on the TV show Taxi (1978).