Swimming for Seiko

This is Seiko whom I met a few days ago somewhere in London. Seiko was accompanied by her human who had a field of vision of only 20 per cent due to a rare condition.
I asked the owner, Mark, to allow me to take a few portraits of his gorgeous canine friend and he kindly accepted.
He told me that Seiko was helping him get around and the two of them were so good together that he actually decided to raise money for guide dogs pledging to swim a mile in one go.
Here is a link to Mark's page and below you can see one of the portraits I took of Mark's little angel, Seiko.

Seiko, the guide dog