The Million Dollar Duck (1971)

Original Title: The Million Dollar Duck (1971)

Albert and his family are always struggling to pay the bills. As a scientist, his job does not grant him a lot of money, so he has to take his lunch from home. One day, his wife gives him an applesauce for taking to work for lunch, but a duck on which Albert is doing some experiments, steals it and eats it. That same duck escapes and gets irradiated at the radiation lab. Albert boss decides that the duck is no longer useful, and that Albert needs to get rid of him. Instead of killing him, Albert takes the duck back home with him so that his kids can have a pet. Soon, they discover that now the duck lays solid gold eggs!