I have an approximately 8 week old kitten that is underweight & breathes very hard with his mouth open. He also cannot meow. At all. He looks really out of it. Took him to the vet yesterday because of this & the fact that when he eats he makes a loud cracking noise like teeth grinding or twigs snapping. No diagnoses yet. We got meds but he barely eats. I am pretty sure he is not hissing though because he sleeps on my lap &his comfortable around me. Any ideas on what is wrong or maybe even the right place on this site to post and get some advice?