Another quick note: The locals sneered at eating jackrabbits, claiming they were “nasty”. Don’t always take other people’s word for things! Check it out on your own. [Anglos in Alaska also claimed snowshoe hares were inedible– “give them to the Natives”– but we enjoyed them.]
Just to be sure, I called the Idaho Dept of Conservation, and they said that they were unaware of any jackrabbit health problems. And even if the jackrabbits were infected with anything, thorough cooking would render them perfectly safe. So, yes, as posted above, check the livers. But if you’re hungry, wash your hands, cook the game thoroughly–and live!