Be sure and check the other appliques. did you use Minkee? I would take this into my embroidery software and examine it under magnification. It looks like it didn't catch at that side and you look like the belly is going to do the same. So even if you redo you could have the same problem. It could be the digitizing of this one duck. A hat could work and a flower on the belly - or an Easter basket, since it is near Easter.
Good luck it is adorable.