Here's why:
* Sugar content: Apples are high in sugar, which can lead to weight gain, laminitis (a serious hoof condition), and other health problems in horses.
* Digestive issues: Apples are difficult for horses to digest, especially in large quantities. This can cause colic, a painful condition of the digestive tract.
* Toxicity: The seeds and stems of apples contain cyanide, which is toxic to horses.
How many apples is safe?
If you do give your horse an apple, it should be a small one, and only as a treat. A small apple (the size of a tennis ball) is a good guideline. It's best to check with your veterinarian to determine what's appropriate for your individual horse.
Instead of apples, offer these treats:
* Carrots
* Celery
* A handful of oats
Remember, a horse's diet should primarily consist of hay, grass, and a balanced grain feed.