Why Does My Horse Drool? 10 Most Common Causes


There are numerous things that owners of horses need to be aware of about horses. The reason horses drool and the quantity is vital.

Why do horses drool?

white horse on green grass field

The sight of a pool in front of your horse’s mouth when grooming might be scary. This is particularly true if the pool is big. But, this doesn’t mean there’s something likely to be wrong on the part of the horse. Drooling is expected, however excessive drinking should be examined.

Grass sickness

Grass Sickness is the most likely scenario for excessive crying. The cause for this issue isn’t fully understood however, the consequences are. It can affect your nervous system leading to digestive paralysis.

The horse is unable to swallow saliva, and it can be fatal. It is more prevalent within Northern Europe and Great Britain in comparison to other countries, but it can happen anywhere.


There are many toxins that can trigger excessive salivary flow in horses. The most common is present in clover, but it’s not clover that causes the problem.

In reality, it’s the host of an infection that can result in slobbers, a condition named after the effects of eating it by a horse. Slobbers aren’t a disease that can cause harm and will fade by itself.

Fields that are sprayed with pesticides can pose an immediate threat to animals and horses. Some states have banned the use of pesticides on the land that is used to produce feed for livestock.

Eliminating pesticides could help avoid the possibility of this type of poisoning, However, if your horse already ate it then you must notify the vet.

Ragwort which is a scourge for those suffering from hay fever can be harmful to horses. A tool is a ragwort fork that could assist in ridding your paddock and pasture of this danger.

If you are allergic to this plant it’s prudent to wear masks, gloves, and goggles or hire someone who’s not allergic to the plant to take care of it.


If it’s caused by a hard-handed horse or a rider chewing on something which can cause damage to teeth, an injury to the oral cavity can result in salivation. It is important to examine the mouth with care from the inside and outside to determine if something is the cause of the issue. If you find the cause, take a break away from the source to aid in healing.

If you’ve let another person have the privilege of riding your horse, and they are accountable for their actions, you might wish to ensure that they are taught how to handle the reins in a safe manner.

One of the most painful pieces that exist is any part that is used by someone who is using it in a way that is too harsh. This is just as much to the advantage of the horse’s rider as it is for the horse’s. Certain horses don’t like rough handling and could be prone to throw the rider.

Dental problems

brown and white animal on green grass during daytime

If you’ve had a toothache, then you’ll be able to understand why horses might have issues in this area. If you’ve had the privilege of being around children enough, you might have had a tooth-cutting drool.

When looking for signs of injury It is advisable to examine horses’ teeth. The tooth’s spurs can cause irritation to the tongue and cheeks, the same way they can do to ours.

To solve this issue you should contact your Equine Dentist. If you’re not experienced with this issue there is a chance that you could suffer serious injuries while doing it yourself. Horses may not bite your finger but the pain might cause you to fall, and you’d be left with other injuries to consider.


If your horse’s breath is bad in addition to the over-drooling, a bacterial infection or ailment could be the cause. As with many issues, this one is for the veterinarian to address.

The antibiotics and herbs that humans are using may not be suitable for horses. The nature of the infection will determine what medications are being used to cure it.

Nasal discharge

Nasal discharge is an indication of a serious issue. If food particles get stuck in the stomach area, it may result in a situation known as a choke. It’s unlikely to be able to go away by itself and may require the assistance of your vet. Horses don’t urinate and therefore they won’t be able to remove it on their own.

Have you been in a situation similar to the horse that is in the image above? I’ve never. In the blink of an eye, we saw him sporting clear foam covering his mouth, and on the stall in front of him. I was confused so we contacted the vet. He’d never encountered the same condition before and was unable to provide a solution.

Our horse was watched for the next few days and observed that he was pushing his neck onto the gate to the stall and then taking into the air. This caused the white foam. Hence, we tied a piece of string across the gate to stop the horse from pulling his head out and the foam stopped.


grayscale photo of 2 horses

Both fear and excitement can lead to exceeding the amount of saliva a horse produces. In case of fear, it begins due to the startle reaction that horses make their mouths dry. After they calm they release more saliva to replenish their mouths. This is completely normal.

Morning sickness

The process of pregnancy can do a variety of bizarre things to female mammals. Hormones release that causes emotional turmoil and triggers stomach problems. They are the most frequent during the first three months of pregnancy. Your veterinarian will tell you how to ensure that the mare is at ease.


The weather can play an important role in the extent to which an animal drools. They are able to lose some body heat resulting from temperatures that are hot by the formation of saliva. The horse needs access to clean water as well as an area that is cool in the heat to prevent heat-related illness.

More work

As the horses are relied on to perform more, it produces excessive saliva. It’s common and perfectly normal. Be aware that if a horse has become too warm following training, it is required to cool off before going to a water fountain. The loss of saliva can cause it to thirsty for water.

There are some uncommon reasons for horses to be prone to excessive drooling also. The Borna Virus virus may be the reason. It’s not common however, it’s similar to polio with regard to its effects. It can be fatal if it is contracted. The most common way to spread the virus occurs via the urine of animals that have been infected.

Another type of virus, known as equine virus arteries, could cause excessive crying. The issue here is usually in mares and is usually passed on by mating.

If an expecting mare is bitten then she’s likely to end up having an abortion because the disease and pregnancy aren’t compatible. There is a vaccine that can be found throughout the U.S.


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