* Horses produce a significant amount of saliva. This is especially true when they are eating.
* Saliva helps break down food by mixing with it and creating a bolus for swallowing.
* Horses can produce up to 10 gallons (38 liters) of saliva per day. This can vary depending on their diet, breed, and other factors.
Therefore, a horse's saliva production can be quite substantial, and it plays a crucial role in their digestive process.