French bulldogs can also suffer from a condition called megaesophagus, a term which collectively describes several esophageal disorders and malformations in any combination from single-to-double or multiple. One of the more serious complications in a dog affected with megaesophagus is passive regurgitation, in which the affected dog vomits up food or phlegm after eating or exercise. Passive regurgitation can frequently result in aspiration pneumonia.Another result of the compacted airway of the French bulldog is their inability to effectively regulate temperature. While a regular canine may suffer to some degree from the heat, to a Frenchie it may be lethal. It is imperative that they be protected from temperature extremes at all times, and that they always have access to fresh water and shade.
French bulldogs can also suffer from an assortment of back and spinal diseases, most of which are probably related to the fact that they were selectively chosen from the dwarf examples of the bulldog breed. This condition is also referred to as chondrodysplasia. Some breeders feel that only dogs that have been x-rayed and checked for spinal anomalies should be bred from, but this is a difficult position to take sides on. While it is true that no dog affected with a spinal disease should be bred from , there is a great deal of variance in the appearance of a French Bulldog's spine as compared to, for example, a labrador retriever. If possible, such decisions should be left to either a veterinarian or breeder who has seen quite a few bulldog breed spinal x-rays, to avoid eliminating dogs unnecessarily.