If you haven't fused the rooster on to the background, you might consider crosshatching the background with a visible thread to suggest a chicken wire fence then with the rooster fused on, quilt him separately - and I agree with the suggestion to cover with a fine mesh to avoid having to stitch every single piece down...just audition the mesh/tulle to make sure it won't alter the colors in the rooster. Since it's a wall hanging, I think, it probably won't be washed much so it would not be necessary to stitch down every piece that's been fused.