I woke up this morning and noticed my cat has this abnormal hoarse meow, like she is loosing her voice. When she is purring the sound is so weird and she snores while she sleeps. It sounds like something (maybe saliva?) is obstructing her throat. I checked on Google and it seems this could be a symptom to upper respiratory infection. Before jumping to conclusion and just loosing money at the vet, I was wondering... how long can I wait before I should really be concerned with my cat's current symptom? It would be such a shame to know that maybe tomorrow her meow would be back to normal without any medicine! Also I am not sure I can relate the other symptoms of upper respiratory infection to my cat. Here's why : - She does have runny eyes and nose, but has been appearing and disappearing for many months now - Here in Switzerland it is amazingly hot these days (one of the worse heat wave ever recorded). Maybe her meow problem is caused by that? - She doesn't go outside and she is my only cat (while upper respiratory infection is a viral disease) - she seems to be less hungry than normally, but her weight is stable Should I run to the vet's office right now? Should I wait? How long before i should be worried? Any advice would be greatly appreciated!