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.
Link - via j-walkblog
From the Upcoming Queue, submitted by Minnesotastan.
I say that because in in a lot of ghost lore / stories, the dead seem to be able to effect that which they care about the most (whether is love or hate).
So, as far as supernatural events are concerend, I think this one is a lot more probable than the virgin mary toast or the elvis rock. But I still believe its just a happy coincidence.