If a cat stops eating you Must take them in to the vet cause after 2 days their body starts attacking their liver and it will start to shut down!!! Its a critical situation that may not be reversable if you waited too long. Sorry for the bad news, my cat went through it :(
Goid luck!
When you introduce a new cat to your home, you must keep them in seperate room for about 3 days and let them get used to each others smell through the door.
About reverse sneezing ... My little 10 year old female cat who weighs only 8 lbs just started diing the reverse sneezing. I took her to the vet and they told me to give her 5ml of zertec for 3 weeks to see if that clears it up. I will keep you posted on wether it works:))
Ps when ever you...