Why isn't their any squirrel hunting in idaho? And also if I hit an animal on the road or see a sick or injured one while hunting can I put the animal down myself and contact Fish and Wildlife?

I know that red squirrels are protected I was wondering why? I've noticed many other states allow hunting of them. I am not aware of threats to them other than invasive squirrel species. As to the putting down of injured or sick animals I have put down animals before in my home state of Missouri mainly raccoons that showed symptoms of rabies.