Of course, I might be holding back out of fear of being invited by Christine O'Donnell to a satanic witchy picnic on a blood -
stained altar (said bloodstain most likely
caused by a diabetic performing some
dark and devilish ceremonial pricking of their finger to check their glucose levels, which obviously is demonic in nature and proof of why the healthcare reform act should be done away with so they can let such practitioners of such technological
dark arts die due to lack of insulin)
In humans, a medical condition called porphyria
causes teeth and sometimes nails to
stain red; a similar condition in cats could
cause dark red (almost black)
staining of teeth and claws.