So why did Rick sacrifice the pigs? He drove out, as soon as he drove out, and before they even revealed what was in the box, the walkers turned and followed him. Then he put down a pig after they were following him. Why not just lure them away like they already were with noise, etc. they were following him already. A few scenes later the walkers are back at the fence. What was the whole point of the pigs then since it didn't do anything extra?
Also, they are so worried about the fence collapsing, but time and time again there is no one out there stabbing them through the fence, only when it is almost to late. They showed a late shot when the walkers were back at the fence, and still no one around anywhere.
Why not put up barricades so the walkers can't see you in the yard?
Why not go out there in vehicles and take care of a large number of them? Sure, as they said on talking dead they don't want to attract attention, so don't use loud weapons, use cars, knives, etc. Lots of quiet ways to thin that herd. Lure them away, etc. Woodbury had large military vehicles that could drive right over them, if they get stuck, someone else can come help.
Why are they not closing their cell door. It doesn't need to be locked but you can close the door, walkers don't open things. Instead you want to put up a thin sheet as a door instead of that big steel door?
I did not like that someone that just turned hours ago, was able to have its head smashed in with a boot and it popped like a ripe melon. Ok, I can buy it on the old ones, but someone just turned? One stomp and it explodes?