Why does a Border Collie drool a lot? If a Border Collie has periodontitis, esophageal foreign body or mandibular fracture, it will be easy to drool. You should seek medical attention in time. When a Border Collie is excited or nervous, he will drool constantly. , the owner can just give it good comfort; the little Border Collie in the period of changing teeth will also drool easily, which is normal.

　1. Caused by disease

If the Border Collie has oral diseases such as periodontitis, throat and esophageal diseases such as esophageal foreign bodies, or mandibular fractures, he will drool excessively. If the situation is serious, take the dog to the hospital to see a doctor in time. And you should clean the dog's tartar regularly to maintain oral hygiene.

　2. Caused by excitement or nervousness

It is only natural for dogs to drool when they are excited. It is inevitable that saliva will flow when seeing delicious food. Even humans cannot resist the temptation of delicious food. Not only delicious food, but also when the owner gives a signal to go out for a walk, the dog will be excited, and the mouth will secrete a lot of saliva. This is a conditioned reflex. Some dogs have weak constitutions and drool desperately when they are nervous or trembling. Some dogs usually do not leave the door and do not take a step forward, so they develop social fear. When other strange dogs approach, they may become nervous and anxious. Of course this is relatively rare.

　3. Caused by heat dissipation

Dogs do not have sweat glands, so it may be that the Border Collie is too hot and can only stick out its tongue and drool to perspire. This behavior is normal and there is no need to panic.

4. Caused by tooth replacement

When dogs are teething, their salivary glands are constantly stimulated, resulting in increased saliva secretion. In addition, their swallowing function is not fully developed, so they will easily drool.