Tracheal collapse is a narrowing of the inner diameter of the trachea, that changes as the dog breathes. The cartilage rings of the trachea lose their rigidity, and collapse when the dog breathes, causing a harsh cough. Not to be confused with "reverse sneezing" there is a distinct difference between the two!
Most often this disorder is seen in middle-aged toy and miniature breeds. Chronic respiratory infection, obesity, and heart disease may all contribute to the development of the condition, although it appears that it may also be congenital.
Your veterinarian can discuss with you ways to manage this condition in your dog. Most cases can be treated successfully medically. Your dog should always be walked on a halter, rather than a collar to prevent further damage to the trachea. Although there is no conclusive evidence that it is genetic, affected dogs should not be used for breeding.
Severe cases can be life threatening and may require surgical correction. If your yorkie needs this surgery we urge you to get a second opinion and also to see an experienced surgeon!