I’ve failed at finding this book after many, many years of trying and I hope you can help! It’s a sci-fi book and starts with a family being massacred by an army of mutant pigs, using modern weapons. I remember it being sort of graphic, the author even describing some gore, smells etc during this scene. I can’t remember if it was set in like a future earth or not or an alternate version of earth. I’ve head people say it’s Animal Farm but I’m pretty sure it’s not Animal Farm.
Lost Classics of Teen Lit: Name That Book! 