Christopher Crumpet

Through drawings, an illustrator tells his dog the story of a boy named Christopher Crumpet. Christopher can at will change himself from a little boy into a chicken. He threatens to do so if his father, Marvin, won't buy him a rocket ship. Marvin doesn't want a chicken for a son, so he does whatever he can to appease Christopher. But time after time as Marvin fails to come through with the real new rocket ship that Christopher wants, Christopher turns himself into a chicken. (imdb)