As a matter of discussion (and not to spoil the story) I am amazed how much food Bilbo Baggins had in his larder and was able to feed so many dwarves! A lot of food for one Hobbit to stock pile and not worry about going to waste :-)
Spoiler Below
One thing that made my wife and I say the same thing at the end of the movie was "If they had access to those birds, why the hell did they walk so far and why did it put them at the top of that tower and make them climb down!