my mom's yorkie has a bad case of collapsed trachea. if he ever stops breathing put cough medicne down his throat with a syringe. don't feed him any dairy products. we give him hip chips and super 5 supplement from wellness. he's doing pretty well. he did go to the emergency vet last year when he stopped breathing.
he could use the stent surgery , but my mom couldn't tolerate losing him if anything happened to him during surgery.