The question about animals is a good one. Another one is, who in hell is mowing all the grass? I understand in Woodbury the Governor probably assigns people to mowing the grass, but what about in the zombie infested areas? They look perfectly maintained, although the zombie apocalypse has been happening for a whole year (if I don't mow my yard every week, it's grown out of control!) I have noticed the prison yard seems to be actually be growing, though.
Also, who is maintaining the haircuts in this group? Daryl seems to be the only one whose hair remains unkempt, everybody else has perfect hair (albeit greasy looking). Carol's hair hasn't grown an inch since she was first introduced. Did Glenn use to be a hairstylist before everything went to shit?