I don’t quite remember the plot, only a pair of following scenes.
1. Two zombie-virus infected dogs attack the main heroine and their jaws don’t open like usual, instead their heads tear in two halves each, opening a few rows of teeth on them. So their jaws work horizontally.
2. The main heroine shots some zombies from a gun with silver coins when she runs out of silver bullets.
I saw this film in my childhood, 2007-2010, couldn’t remember any actors.