In a 7 year old mare a uniform black discolouration was appreciated in all teeth. The owner explained that the animal had been fed eggplants ad libitum.

It has been reported that certain pigments present in food can cause changes in teeth colouration because they deposit on the cement covering the teeth. For example, in animals that eat beetroot or even feces. We have not found, though, any reference linking consumption of eggplants with this change in horses, in any case it can not be excluded.

As a curiosity… we have read that an ancient asian upper class tradition, in certain countries, consisted on making a dye from dark eggplant skins to dye their teeth black, this practice is known as Ohaguro in Japan .

However, foodborne teeth color changes do not usually have such a uniform distribution. Other causes could be a congenital cement abnormality or due to drug administration but, again, this has not been described.

Another possibility that could explain a change in color of the teeth is that it was a chronic fluorosis due to the ingestion of drinking water with high fluoride content or ingestion of pesticides containing fluoride salts.

Intense black coloration of the teeth of a horse.

Intense black coloration of the teeth of a horse.

All teeth are affected uniformly.

All teeth are affected uniformly.