Morality in animals

[robvalue]

I heard a wonderful story while at a monkey sanctuary. (A different one!) I believe it was a true story, it was presented as such.

One of the staff told us about enrichment that had been set up for two monkeys who were either side of a fence. There was enough room for them to pass things through the fence, but not to get to each other. They had placed a load of food in one of the enclosures, so that the monkey couldn't get it out. But they had placed the tool needed to get the food out in the other enclosure.

The monkey passed the tool through to the other one, so he could go get the food out. It worked, and he got access to the food. Then he took half of the food back, and passed it back through to the monkey who gave him the tool