The image looks like the head of a dog, and, in fact, remarkably like the profile of Fletcher. The image was created by water dripping down from the patio cover onto the dirt on the grill cover. It's just a coincidence that it looks like a dog.
And the smaller image to the right of the dog - it looks like a fish jumping out of the water. Fletcher used to love to go fly fishing with the family.
There's a video of a local news report at the link.
From the Upcoming , submitted by ueue .