Have they addressed why there are any Walkers left yet?
I stopped watching this shortly after the magic dumpster incident but I remember from the old imdb boards there was an on going discussion about when the Walkers would run out.
There was some analysis around the group's kill rates in a given area and over time how many Walkers would be left. They should reach a level of relative safety within a given area over a certain amount of time, asides from some mass Walker migration happening because, well just because!
I now know we've had time jumps, so even more time has passed. So my question is - Is this a development in the show? Are the Walkers running out? Or if some random walks 10 yards outside their compound on their own are the STILL randomly getting attacked?