The Girl with All the Gifts (2016)

Plot hole: Based on Melanie's age and the state of decay of London, the world has been zombified for at least 10 years. Yet Melanie finds a small dog still alive inside an apartment which she uses to distract the hungries. The dog should have died many years prior.

Melanie: We're alive?
Dr. Caroline Caldwell: Yes. You're alive.
Melanie: Then why should it be us who die for you?