You've really thought of a great idea. As Todd and Vixey don't have kits in the end. The background it very beautiful, I love the flowers next to Vixey's head. Both Todd and Vixey have been drawn very well. You've incorporated the colours amazingly on the pair. The colours are spectacular, it's like this scene could have been in the film. It's quite amusing on how big Vixey is carrying all those kits.
The bird on the branch with the rest chest, his perching it looks kind of odd. Maybe he should have perched a bit further back on the branch. With his feet gripped around the branch as he has huge ones. The branch also appears to be slanted. But it's not so noticeable as the fox couple draws the focus away from the birds feet.
But apart from that it is very good, great work!