>They only own what they can carry
Aphids?
https://www.sciencedaily.com/releases/2007/10/071009212548.h...
Aphids?
https://www.sciencedaily.com/releases/2007/10/071009212548.h...
Perhaps someone should specialize to handle sheep and goats. If you want deer or bison, then form a hunting party, and then trade 100s of kilos of sausages for your kid's first bike-trailer-home.