Felicity has been "coughing" for the last 5 or so minutes.. and she keeps acting like she's about to throw up but nothing comes up. I've never seen her or the other cats do this.. its like.. you know when your sick, and you have the dry - heaves.. where you throw up but nothing comes out.. sorry for being so gross. but thats the only way i can think of to explain it.. i'm worried about her please let me know whats wrong!