This Aardman animated film has elements reminiscent of "The Ugly Duckling," centering on an egg that falls from its nest and is discovered by some gentle mice. Upon hatching, the chick, named “Robin,” is raised by these mice, who readily take him in; he initially believes himself to be a mouse with feathers. However, Robin begins to feel isolated because it can't fully become one of them, leading it on a journey fill…