The judges for the contest would happily chomp on any manure, and yes, they're a group of nine thousand dung beetles.
Different beetle species favored different types of dung. But dungs from omnivore were clear winners, and chimpanzee and human feces were right there at the top. Carnivore dungs were more attractive than most herbivore dungs. And even more amazing, the two least attractive dungs were those coming from two native species, the bison and the moose (clearly I was expecting the beetles to stick to their staple diet).
This, however, is not the reason why our dung were so sought after. As for the difference in diet, the authors said the exotic dungs were collected from a local zoo, where the carnivores were fed the same diet, so were the herbivores. So, the fact that the beetles favored different types of poops suggested there was more to poop flavor than the diet.
I believe it's the smell.
Whipple, S., & Hoback, W. (2012). A Comparison of Dung Beetle (Coleoptera: Scarabaeidae) Attraction to Native and Exotic Mammal Dung Environmental Entomology, 41 (2), 238-244 DOI: 10.1603/EN11285