Our 10-year-old calico, Mellanby, coughed up a hairball or two today and yesterday. Not a problem...doesn't happen too often. But i noticed that, afterwards, she was very hoarse. She tried to meow at me, but it came out as more of a croak. She ate her dinner perfectly well, and seems otherwise normal. Any idea what this could be and, if she's in discomfort, what I can do to alleviate it? Appreciate your input.