Here’s another trio of similar covers, all of which have been published relatively recently: A Dog’s Purpose by W. Bruce Cameron (published by Forge Books in July 2010), Stay by Allie Larkin (published by Dutton in June 2010) and The Art of Racing in the Rain by Garth Stein (published by Harper Collins in June 2009).
Jacket Why also recently posted about dogs on covers in a post entitled “A Pack of Dogs.”
Edited to add:
It turns out that the dog on the cover of Stay is actually the author’s dog, Argo, who was the inspiration for the main character’s dog. Read about the cover on Allie’s blog, Incidents and Accidents.