Usually dogs are known to understand when its time to eat in their bailey chair, and this helps prevent issues. Bailey chairs can be made and are sold. Also, a simple chair turned upside down can be successfully used for this purpose. In two unrelated incidents in Latvia and Australia megaesophagus developed in dogs that had eaten certain brands of dog food, however no agent that could have caused the disorder has been found in lab tests of the food. Diagnosis
An important distinction in recognizing megaesophagus is the difference between when a dog regurgitates or vomits. When a dog regurgitates there is usually not as much effort involved as when a dog vomits. Often when regurgitating, the dog will tip its head down and the liquid and/or food will almost appear to "spill out" of its throat.One of the primary dangers to a dog with megaesophagus is aspiration pneumonia. Because the food stays lodged in the throat, it can often be inhaled into the lungs causing aspiration pneumonia. One way to avoid this is to make sure that every time the dog eats or drinks anything, that the dog sits for at least 10 minutes afterward or is held in a sitting up or begging position. This disorder has a guarded prognosis, however, a successful management technique is vertical feeding in a Bailey Chair. Affected breeds
Cats
Affected breeds:

American Shorthair
Persian (cat)
Siamese (cat)

Horses
Megaesophagus is rare in horses. It is more frequently reported in Friesian horses than in other breeds.
Most common pathogens are Pneumocystis jiroveci, Mycobacterium avium-intracellulare complex, Streptococcus pneumoniae, Haemophilus species. Less frequent pathogens are Cryptococcus neoformans, Histoplasma capsulatum, Coccidioides immitis, cytomegalovirus (CMV), and Toxoplasma gondii. Chemotherapy-induced immunodeficiency may lead to severe lung infections. Pathogens commonly associated with lung infectioins are bacteria (like Pseudomonas aeruginosa, Stenotrophomonas maltophilia, and Nocardia species), viruses (eg, respiratory syncytial virus, parainfluenza virus, influenza virus A and influenza B, and cytomegalovirus), and fungi (eg, Aspergillus, Fusarium, and Mucorales species, and Pneumocystis jirovecii). Double pneumonia (bilateral pneumonia)
This is a historical term for acute lung injury (ALI) or acute respiratory distress syndrome (ARDS). However, the term was and, especially by lay people, still is used to denote pneumonia affecting both lungs. Accordingly, the term double pneumonia is more likely to be used to describe bilateral pneumonia than it is ALI or ARDS. Severe acute respiratory syndrome
Severe acute respiratory syndrome (SARS) is a highly contagious and deadly type of pneumonia which first occurred in Nov-2002 after initial outbreaks in China caused by SARS-CoV/SARS-CoV-1,which almost disappeared by the month of May-2004. The second outbreak of SARS-CoV-2 started in December 2019 from Wuhan, China and was declared pandemic by WHO on 11 March 2020. SARS is caused by the SARS coronavirus, a previously unknown pathogen. By area of lung affected
Initial descriptions of pneumonia focused on the anatomic or pathologic appearance of the lung, either by direct inspection at autopsy or by its appearance under a microscope. A lobar pneumonia is an infection that only involves a single lobe, or section, of a lung.