What should you do regularly to maintain a healthy field for ponies?

Checking for poisonous plants is essential for maintaining a healthy field for ponies. This proactive measure helps ensure that the grazing areas are safe for the ponies, as certain plants can be toxic and harmful if ingested. By regularly inspecting the field for these dangers, you can prevent accidental poisoning, which can lead to serious health issues or even fatalities in ponies. Knowing which plants are poisonous and their appearance allows for timely intervention, which is critical for the overall well-being of the animals.

Monitoring water levels and providing frequent treats, while important in their own right, do not directly address the safety of the grazing environment, and paddling in the creek does not contribute to maintaining the field's health. Thus, vigilance regarding poisonous plants is the most significant action for safeguarding the ponies.