When The Walking Dead returns for its sixth season on October, non-human threats will be the top priority for Rick and co.
Here's a preview from showrunner Gale Ann Hurd:
It goes back to a numbers game really. If you think about it, the human population is not growing, but the walker population is. We've seen various herds that they've encountered at various points, so we know that they're out there and we began to see the trap that The Wolves set. We've seen again that you cannot underestimate the threat that a herd of walkers has, especially if you're caught up in a trap like that.