Pumpkins, including the skin, pulp and seeds are safe for horses to eat as occasional treats, but it is an acquired taste and common sense is needed when feeding them.
Source: My New Horse, EQUUS, October 31, 2023. Link.
Also see: Safe feeding tips and precautions when feeding pumpkin to horses, The Equine Institute, September 16, 2024. Link. When preparing pumpkins for horses, it’s essential to cut them into smaller chunks to prevent choking hazards. Removing the seeds is a recommended precaution to avoid any potential health issues, although small amounts of seeds are generally not harmful.
Introducing pumpkins into a horse’s diet should be done gradually to allow their digestive system to adjust.”
Image: Link.