Hi. I have a 17 year old cat( Approximately calico. She has elevated liver and kidney levels but not too bad and is on KD dry food but loves wet also. About 2 months ago she started grooming excessively. Now her front legs are brown , not white anymore and everwhere she sleeps she leaves brown stains. 2 vets have said it’s iron in her saliva .. she is on a very low dose gabapentin and she has gotten a bit better with the excess grooming . I have been told that all cats have iron in their saliva but why all of a sudden is it so much and is there anything to do. Fecal urine and bloodwork mostly normal