usually she doesnt let me open up her mouth to see it. Its like a patch. Is this something that any of you have seen in your cats or atleast heard about? I am anyway taking her for her Vaccine booster shots this 24th. Wanted to know if this is something I need to raise a concern about to the Vet. (I am planning to ask him anyways) but I need some information to fall back on so that I can insist the vet to take a second look in case he dismisses my concern about this discoloration.