Poor Emily. Hopefully it is just an allergy since you added that to the litter yesterday. I'm keeping my fingers crossed that it is nothing more.

If her nose is stopped up she can't smell good and that could be the reason she isn't eating. Has she ever had a URI before? She may just be having a flare up. A few weeks ago I was worried because I thought Jazz was getting another URI but she was only sick about 48 hours and after another day she was back to 100%. If Emily ever had one as a kitten maybe she is just having a flare up that will only last a few days.