Here's why:
* Aesculin: Horse chestnuts contain a compound called aesculin, which is toxic to squirrels and other animals. It can cause digestive upset, vomiting, and even death in large quantities.
* Saponins: Horse chestnuts also contain saponins, which are compounds that can irritate the digestive system and cause diarrhea.
Important: Even though squirrels might be tempted to eat the shiny, brown nuts, it's crucial to discourage them. Offering safe and appropriate food sources like nuts, seeds, and fruits is essential for their well-being.
If you suspect a squirrel has ingested horse chestnuts, contact your local wildlife rehabilitation center or veterinarian for advice.