ICan Icelandic Cod Liver in Own Oil Flavor:Natural Size:Pack of 6

I had one bent can, but the livers tasted great! however, i was a little nauseous later. what's the significance of bent cans?

What's the shelf life on an unopened can?

Does the caloric value include all the oil in the box??? Or just the fat in the liver?

What is the nutritional value?