Several of my cats are having this problem. The youngest one seems to be getting better but my two senior cats are getting worse. They are coughing, sneezing, have runny noses, not eating, losing weight, and are having trouble breathing. They shudder with each breath. One breathes only through her mouth, and not very well. I cannot afford a vet. What is wrong with them? Is there anything I can do? Will they die?