Don't know where to get meat? You definitely need the Hunter's Hut.
   
Just build it in the Midwood behind the suspicious bush from level 17. 
   
With the help of the Hunter’s hut you can get not only your guaranteed trophy - meat but also some rare resources like leather, horn.  
   
Upgrade the Hunter’s hut and hire more workers to get more meat and have bigger chances to get rare resources.