Cave_Johnson
R.I.P. Bob Saget
Those are all valid complaints, and they all can be pretty much explained by 5 words...
It is a zombie show.
This is a show about walking corpses. Movement requires energy. Muscles moving requires flowing blood. The show is impossible on so many levels you simply have suspend so much disbelief that you simply can't look at it too closely.
Given that, it is an absolutely wonderfully made show, and likely the best entrent into the genre ever. GREAT comparison to BSG, btw. I had never thought if that, but it fits very well.
That's probably the best explanation for most of this stuff I'm bitching about. And really that's fine with me. A lot of this shit wouldn't be as entertaining if they explained everything in deep detail.
Still a really good show like I said, but when I watch stuff like this I always catch myself criticizing little things that don't add up. Honestly the story is good enough that even when a zombie comes out of nowhere and somehow bites 3/4 of the way through someone's neck it's more humorous than anything.