Why does your dog vomit after drinking?

When food or water is detected in the oesophagus, a normal neurological reflex will cause a muscle contraction and relaxation that transports the food into the stomach. Other reflexes prevent breathing during this swallowing process to protect the lungs from aspiration. When this process is interrupted by a disease such as Megaesophagus, the oesophagus loses its ability to transport food. The most serious complication is that digestive fluid will at some point pool in the oesophagus. Since a dog's trachea connect to the oesophagus from the underside, this pooling generally results in aspiration of digestive fluid, leading to pneumonia. Normally an affected dog will exhibit other symptoms such as inability to swallow large mouthfuls of food, fever and foul breath. It is important that your dog has a thorough veterinary examination in order to diagnose him. Before this happens, you must make sure that your dog is receiving adequate nutrition (food and water) and document any additional symptoms - this will help your vet. If he has Megaesophagus your vet will discuss how to prevent further complications such as pneumonia.