There are many diseases that can cause these symptoms all the way from something as benign as a little virus to autoimmune disease to cancer. IBD is common in Yorkies, but that can't be diagnosed until other things are ruled out and would not include mucus filled lungs. It sounds like these symptoms have been going on for weeks. This girl needs to see a vet for testing today.
__________________ Crystal  , Ellie May (RIP)  , Rylee Finnegan  , and Gracie Boo🐶 |