I watched I Am Legend and didn't think much of it. I was so annoyed with the god-awful CGI used for the wild beasts in New York (i.e. the lions), the 'devestation' which was just drawn on over existing buildings and of course the creatures themselves, I forgot about his dog. I was too bored to care by then - I Am Legend was just a cheap and slightly more explosive 28 Days Later rip-off.