thanks!
@MerryMary I would second @MarcRobinson's comments.
And I would add that, I'm not sure what's happening with the geese in the middle plane. It appears to be a mangled mess of birds and it's hard to read which bird is pushing away another. It also looks like there's a 3rd goose head that doesn't connect to a body.
You might also want to look at some Air Plane references so that you can decorate the plane in a more interesting way.
If you keep this angle, you could try and add some interesting elements way below on the ground, like a road, farm, city scape, etc. and then compose those elements in the picture to direct the eye back to the geese and the chicken.
Below is a draw over of your composition and where my eyes go. You might consider changing the geese to create a circular rhythm to the piece (see below). 
You can see a blue oval which circles around the piece. You don't have to use this, this is a rushed example, but you can take advantage of the birds wings and long necks to create a rhythm in the piece.
Hope that's helpful!