Headscratchers / Shaun the Sheep

• Why is it that the humans don't talk in the show, but in the main series Wallace and Gromit, they talk?
  • In-Universe: We're seeing things from the sheep's perspective and they can't understand human language, so all we get is the same vague mumbling presumably all non-pet animals in the W&G universe hear when humans talk. Out of universe: Lack of spoken dialogue was probably a creative descision to make the series easier to animate and export.
• How can the farmer see with those glasses? You can't see his eyes when he's wearing them.