My only issues with the episode was that it seemed predictable. When Rick met the derelict woman I immediately thought "Book of Eli" and it was going to be a set up to get jumped and robbed/killed. The actress even looked like that woman from Book of Eli, kind of.
At first I thought, like Nathan Fillion on TD, that it was some kind of human that hadn't turned full walker. Mainly because of her coloring. After that I thought it was going to be a cannibal ambush. :lol
I agree about the pig, I said the same thing that they should have had Hershel look at it. He was right there teaching Rick about farming, I'm sure he saw the pig.
I watched this with my 10 year old nephew last night and when the walkers starting coming through the roof he started singing "It's Raining Men". Then we got another laugh when the producer said the same thing on TD. :lol