Chicken in the Rough is a 1951 animated short starring Chip 'n' Dale.
[1] It is Chip 'n' Dale's first solo cartoon together, and the footage is reused from the Silly Symphony short, Farmyard Symphony (1938).
In the short film, Chip 'n' Dale wander into a farmyard to collect acorns.
Dale mistakes an egg for a nut, but when he tries to demonstrate to a newly hatched chick how to get back into the egg, a rooster mistakes him for one of his chicks, much to Chip's amusement.
This article about a Disney animated film of the 1950s is a stub.