The blending on the above tile is pretty good, he gave the other tilers something to work on.. I wish people would leave a message when they downvote, as the author said Criticism > Rating :)

I noticed you left a darker edge 1 pixel wide on the lower and left sides. That edge makes it difficult for other tilers to blend with your tile. I don't know if you were working with a feathered selection or not, but if you were to draw over your edges (you did overlap on the paw print) it would give your neighbors a smoother transition with which to work. I do like how you hang objects off the tile. They are great seeds for others to work from. But that one pixel border of dark pixels really hurts.