One plant that is looking really good at the moment is Brunnera ‘Jack Frost’.

Those delicate “forget me not” blue flowers are a joy, particularly against the older leaves which have the typical silvered leaves that gives the variety its name.  The younger leaves take a while to develop the hue, but are just as good a foil for the flowers.

This particular plant is in the front garden, so the dogs don’t get too close to it.  The brunneras in the back garden are not as robust as this plant, but they do get a lot more sun.  I have the feeling that it is the growing conditions in the front that enable the plant to grow so well, rather than the impact of the dogs.