Our cat Daisy has feline asthma. What we thought was a hairball turned out to be a scary asthma attack. You search the internet high and low for hairball treatment and you never see this. She wasn't coughing stuff up but she was having a real hard time breathing. She's ok now. See photos below for more X-Ray fun. 

Side close up of Daisy's lungs. She was having a bad day.  

Real close up of her feline asthma. This is some scary stuff. Her air ways were swollen and her gums were blue!! 

Top View of Daisy's X Ray 

Daisy Snowshoe side X-Ray. After staring at all those white swollen air ways, I noticed other things: 5 White Rings on her lower belly are her stitches from getting spade and the funny part, she needs to poop!!!