I have a cat that used to hunt groundhogs and leave them for me on my front porch .. so I don't know that the groundhog would go out of their way to threaten a house cat. read more
Like all predators, cats avoid unnecessary fighting because it’s just not productive. I can’t imagine any domestic cat, no matter how pugnacious, arbitrarily taking on an animal the size of a groundhog. They hunt mice, voles, and the like, not bigger mammals. read more
NO, They may fight but only if there is no other choice to. read more