Dogs and cats and kids seem to want their pictures taken don't they? Cute puppy and very cute quilt.
I've never used the polar fleece, so don't really know a lot about it, but isn't the polar fleece a lot thicker than the cotton? Would you do a single layer of it, or would you try to double it like a cotton binding? I think your cotton binding would be more durable. If you notice, most fleece blankets are just serge stitched or have a true satin blanket binding. Just thing to consider.....Now let's hear what the experts say.