Over 12,000 years ago, saber tooth cats roamed the Earth, although nobody was around back then to clean out their litter boxes. Based on fossil records, paleontologists have discovered that saber tooth cats may have suffered shoulder and lower back injuries while attacking prey.

So if your house cat seems lazy, it might be because your cat doesn’t want to suffer the same fate as its saber tooth ancestors. Now if saber tooth cats just had someone to open a can of cat food for them every day, their health may have improved.

To read more about the health drawbacks saber tooth cats suffered while stalking prey, click here.