However, in dogs with megaesophagus, which is where the esophagus remains enlarged instead of contracting, this doesn't happen as it should. Instead of being pushed down into the stomach, food sits in the esophagus until the dog regurgitates it back up. This makes it very difficult for the affected dog to hold down food and water, so megaesophagus is a very serious condition indeed.
However, dogs can live with megaesophagus, so let's take a closer look at how you can best manage this worrying health problem.
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Signs and Symptoms of Megaesophagus in Dogs
However, in dogs with megaesophagus, the vomiting occurs with no abdominal effort and sees them bring up undigested food. So if you notice the food or liquid appearing to simply fall out of your dog's throat, this is a telltale sign of megaesophagus.
As a result of the condition, it can be quite difficult for dogs to keep down the food they eat. Without sufficient nutrients making their way into your pet's digestive system, weight loss will result, so keep an eye on your dog's overall body condition.
Some dogs with megaesophagus will also suffer from something known as aspiration pneumonia. This occurs when the reflexes that prevent breathing during swallowing so that food and liquids cannot be inhaled into the lungs aren't working properly. If your dog is having trouble breathing or difficulty swallowing, or if they're coughing, have a runny nose, are weak or lethargic and even have a bluish tint to the skin, these could all indicate aspiration pneumonia.
- Dropped Ears
- Effortless regurgitation
- Weight loss
- Difficulty breathing or swallowing
- Runny nose
- Bluish tint to skin
The Science Behind Megaesophagus in Dogs
However, in a dog with megaesophagus, these reflexes don't work as they should. Instead, the esophagus loses its muscle tone and remains permanently dilated, never contracting to push ingested food and liquid down into the stomach.
Food and water then stay in the esophagus until it is completely full and can hold no more. This results in regurgitation, and means that your dog is receiving insufficient nutrients and suffering weight loss. There's also the risk of food in the esophagus being sucked into the lungs, which then results in the potentially fatal aspiration pneumonia.
Megaesophagus can either be a congenital defect or a health problem your dog develops later in life. If it's hereditary, the condition is usually a result of the incomplete development of the nervous system or by a fetal artery wrapping around and constricting the esophagus, preventing its normal functioning.
Congenital megaesophagus can occur in any dog, but breeds like the Labrador, Golden Retriever, German Shepherd, Great Dane and Newfoundland seem to be especially prone to the condition.
In cases of acquired megaesophagus, the condition can be caused by a variety of factors, including:
- Neuromuscular diseases such as myasthenia gravis
- Addison's disease
- A blockage in the esophagus
- Heavy metal poisoning
However, most instances of megaesophagus have no known cause.
Diagnosis and Treatment of Megaesophagus
Unfortunately, megaesophagus can be quite a difficult problem to treat. While some puppies with congenital megaesophagus will outgrow the condition, and some congenital abnormalities can be rectified with surgery, there's simply no cure for acquired cases of the condition.
As a result, treatment is focused on providing whatever supportive care your dog needs. This includes giving antibiotics to treat respiratory infections as soon as possible, and taking special care to manage your dog's eating.
In fact, feeding management is the most important part of treating cases of permanent megaesophagus, and the main focus is on helping food and water move out of the esophagus and into the stomach as quickly as possible. This ensures that dogs get the nutrients they need to survive, as once food is in the stomach it cannot be regurgitated. It's also important because repeated episodes of regurgitation put your dog at a higher risk of aspiration pneumonia, which can potentially be fatal.
Your vet will be able to advise you on how best to manage your dog's diet and feeding routine. Have no doubt that this will require dedication on your part, but that it's essential to your dog's overall health and general quality of life.
How to Feed a Dog with Megaesophagus:
What to feed: Your veterinarian will recommend a food for your dog, although it may take some trial and error to work out the ideal food consistency for your pooch.
When to feed: Rather than one big meal, feed your dog multiple small meals throughout the day.
Prevent extra access: Make sure your dog can't access any additional food and water outside of their scheduled, supervised feeding times. For example, make sure they can't steal a snack from the neighbour's dog's bowl on your morning walk.
Feed in an elevated position: Keeping your dog in an elevated position when eating will increase the angle of their esophagus. Dogs with mild cases of megaesophagus may be able to eat from a raised bowl while in a sitting position, but most dogs will need to eat in a vertical position (such as in a Bailey Chair) and remain upright for at least 20 minutes after eating.
Feeding tube: If your dog is unable to eat on their own, your veterinarian may recommend a feeding tube.
Because when I first bought her she would eat and bring her food right back up