You can see in the first picture of the missing dog his tail is docked. I can also see the full tail in the 3rd picture and there is no mistaking a full tail. Take a look at my Doodlebug he has a full tail and it always shows up really well in a picture. So even if their coloring in their face is similar I would have to say they are not the same dog.
__________________ “Never argue with a fool, onlookers may not be able to tell the difference.”  Mark Twain |