The Demented (2013) on Netflix

Plot summary

Taylor, her boyfriend David, Brice and his girlfriend Naomi travel on vacation to spend a few days with Sharley and her boyfriend Howard at the house of Howard's family in Baton Rouge, Louisiana. The next day a missile explodes near the house, and the friends learn that the United States is under a biological terrorist attack. A hostile dog comes onto the property, so the group locks the door and goes to sleep. In the morning the dog is still outside, and Brice kills it with a bat. David sets out to bring the dog to the CDC, and the friends are attacked by local residents who have turned into rage-filled zombies.