I was very happy to learn something new recently, especially because it was easy.
I've never thought about the benefits of feeding nuts to dogs because, of course, they are not naturally nut eaters. But if you think about it, their bodies ARE designed to eat animals who eat nuts, thus getting some of the nutritional benefits via the meat.
Well my dog doesn't eat wild meat. She eats farmed meat, where even the grass-fed beef and pastured poultry aren't quite eating their wild diet. Even the venison comes from deer that aren't wild, and she's certainly not getting squirrel, the master nut eaters.
The result is that she's not getting a lot of Vitamin E through her diet (unless she eats food that has it added via supplement).