They could be dead trees. also, there could be sheep with only 3 legs (it's happened before), and what appears to be a step doesn't necessarily have to have a door in front. The cart may not be in use specifically because it lost a wheel and is waiting to be repaired.
Also, farmers appear to be havesting grain suggesting a specific season, while a driverless horse pulls a plough, which would appear to be indicative of a different season. Although it's by no means impossible.
The curtains appear to be on the outside of the house.