Beavers are one of the largest rodents on Earth
http://animals.nationalgeographic.com/animals/wallpaper/beaver_image.html
This website show below has a list of some of the nasty ingredients found in the food you consume regularly. The list has arsenic, antifreeze, beaver anal glands and such like. How much of this is true I have know way of knowing.
All I can say is let the consumer beware (be aware) as you do you shopping.