Megaesophagus

Food can become lodged in the flaccid esophagus, where it may decay, be regurgitated, or maybe inhaled into the lungs (leading to aspiration pneumonia).

Myasthenia gravis is a neuromuscular disease where the primary symptom is weakness in various body parts of the dog.

There is an invention known as the "bailey chair" that uses the force of gravity to push down liquids and food into the dog's stomach.

Usually dogs are known to understand when it is time to eat in their bailey chair, and this helps prevent issues.

Because the food stays lodged in the throat, it can often be inhaled into the lungs causing aspiration pneumonia.

This disorder has a guarded prognosis, however, a successful management technique is vertical feeding in a Bailey chair.

An x-ray of the thorax of a dog with megaoesophagus. The edges of the esophagus are shown by the yellow arrows. (In this image, the head end of the dog is to the right, and the tail end is to the left.)
The apparatus for management of the dog's megaesophagus can be simply made from a regular chair turned upside down. Some soft material to protect the back and chest of the dog may be used.