Why Is My Horse Frothing At The Mouth?

Last Updated on February 4, 2022

It is not unusual to see a horse frothing at the mouth, but if your horse has never done it before it can be quite alarming. There are many reasons why a horse might froth at the mouth, so let’s find out more!

What Does It Mean When A Horse Is Frothing At The Mouth?

Horses will froth at the mouth when they have an excessive amount of saliva. There can be a number of reasons for this. Some are part of normal horse behavior, while others are a symptom of medical problems.

It is important to be able to identify the reason why your horse is foaming at the mouth so that you can seek veterinary advice if necessary.

When a horse froths or foams at the mouth, the excess saliva is turned into a white foamy substance. This is due to a substance in the saliva called latherin, which has a similar effect to soap. As the horse chews and moves its lips and tongue the saliva is agitated into foam.

You will see the froth or foam on the lips of the horse, and potentially even falling onto the floor. It is not uncommon for the rider to get covered in foam when the horse shakes its head!

Let’s find out the reasons why a horse might foam at the mouth:

Horse Foaming At The Mouth When Ridden

Is is common to see a horse frothing at the mouth when it is being ridden. Ideally there should be a minimal amount of foam – enough to turn the lips white, but not so much that it splatters the chest of the horse. This foam is generated as the horse works with the bit in his mouth, and a moderate amount of foam indicates a relaxed and happy horse.

If you do not see any foam at all, this is because the horse is tense and in the wrong position to produce saliva. On the other hand, a large amount of foam also indicates a tense horse, as he is not in correct position to swallow his naturally produced saliva.

Horse Foaming At The Mouth When Eating

The act of eating, or anticipation of a tasty meal, will stimulate the mouth to produce extra saliva. As the horse chews, most of this will be swallowed, but you may see some of it around the mouth. This is completely normal and not a cause for concern, as long as the saliva production returns to normal after your horse has eaten his dinner.

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Horse Frothing At The Mouth

Medical Conditions That Cause Frothing At The Mouth In Horses

There are several medical conditions where you will see a horse frothing at the mouth. If you suspect that your horse has any of these then it is vital to seek veterinary advice as soon as possible.

  • Dental Problems

Just like in humans, dental problems in horses can be very painful! If a horse has a cracked tooth or even a splinter in his mouth, he will salivate excessively

  • Choke

When a horse has choke, this means that his esophagus has become blocked, normally by food. He will be unable to swallow any saliva he produces, so you will see large quantities of liquid coming from his nostrils and mouth.

  • Throat Problems

When the throat of a horse becomes swollen, he will find it painful and difficult to swallow saliva. This could be due to infectious diseases such as strangles.

  • Infectious Causes Of Excessive Salivation

Some infectious diseases of horses can cause them to produce abnormal amounts of saliva. These include rabies and equine infectious arteritis.

Infectious Causes Of Excessive Salivation
  • Poisoning

Many toxins and poisons will cause excessive salivation. In recent years, many horses have fallen ill with slaframine poisoning, also known as ‘Slobbers’, which causes horses to drool excessively.

Summary – Horse Frothing At The Mouth

So, as we have learned when horse froths at the mouth this can mean a number of different things. These include frothing at the mouth when the horse is being ridden, or he is anticipating a tasty meal, or because of a medical condition. It is important to seek veterinary advice if you are concerned that a medical problem could be the reason that your horse is frothing at the mouth.

We’d love to hear your thoughts on why you might see a horse frothing at the mouth! Does your horse froth at the mouth when he eats a tasty treat? Or perhaps you’ve got questions about medical problems that may cause your horse to froth at the mouth? Leave a comment below and we’ll get back to you!


Why Would A Horse Be Foaming At The Mouth?

One of the most common times you will see a horse foaming at the mouth is when it is being ridden. Some foaming at the mouth is considered to be a sign of a relaxed and happy horse, so nothing to panic about!

However, if your horse produces a lot of foam when he is being ridden, this might be because he is tense. When a horse has his head pulled in tightly towards his chest he will have difficulties swallowing his saliva, and will produce a lot of foam.

Horses may also foam at the mouth when they are eating, as an excess of saliva is produced. Foaming at the mouth can also indicate medical conditions such as dental problems, choke, or poisoning.

What Causes A Horse To Salivate Excessively?

If you notice that your horse has a lot of saliva, there are two reasons for this. Either he is producing more saliva than normal, or he is having difficulties in swallowing the saliva he produces. A horse produces an incredible 40 liters of saliva per day, so if he cannot swallow it then it will soon become apparent!

Saliva production increases when the horses appetite is stimulated, such as when he is anticipating a nice meal. This is completely normal and part of the digestive process. Saliva contains enzymes that begin the breakdown of food as it travels via the esophagus to the stomach.

Some infectious disorders will also cause excessive salivation in horses. These include rabies and equine viral arteritis. Medical conditions that cause difficulty swallowing, such as choke and dental disease, will mean you see a lot more saliva than normal.

What Does Foaming At The Bit Mean?

Foaming at the bit is a term used to describe someone who is keen to get on with a task. This is because a horse that was eager to move would typically start to foam at the mouth, causing a frothy white substance to appear on the lips.