This came up in some games I played and I thought maybe I was playing on bad maps but it seems to be consistent with the treaty game type.

But no food resources are in starting los on marsh with the exception of a couple pigs, maybe. Is this by design? When I load the same map with the same number of players in supremacy the starting hunt places.
This completely kills the ai because it will not do anything until it finds food nearby.
Chickens seem to survive this purge but I ran through some loads on Oasis and Alfheim and never got any berries either.

So to summarize, it seems like something in the preload for the Treaty game mode is eliminating near hunt and berries.