I have had two calico cats (sisters about 2 and a half years old) for about nine months now. One is the very picture of cleanliness but the other one is filthy and reeks. She does not seem to bathe herself at all, her fur is greasy and she has dandruff and matted clumps of who knows what on her legs and feet. In addition she stinks, it's not just her breath (that is retty bad too), but rather an overall stink. She has not always been like this, it has been mostly in the last two or three months. Any ideas why she is not cleaning herself?