They didn't eat much
I think the first time they showed them eating was after they killed the bear, so it looked like they hadn't eaten for like a week, yet still had the strength to kill the bear. The first 2 days they didn't even try to catch anything. Then
they wanted to fish, but the black guy ruined it. Then they caught a squirrel, but got distracted by a helicopter and left it there.
And don't waste time reading this line, it's just my pointless signature.