The purpose of a pony drift is to gather them up so their health can be checked，the baby ones can be stopped from feeding on their mothers milk，and those whove gone beyond their limited area can be returned to their correct area.Some of them are also later sold，in order to limit the number of ponies according to the rules set by Natural England.

　　Three weeks ago，I witnessed a small near－disaster a few miles west of here.While walking，I noticed a pony roll over on his back.“Hello！” I said to him，assuming he was just rolling for fun，but he was very still and，as I got closer，I saw him kicking his legs in the air and breathing heavily.I began to properly worry about him.Fortunately，I managed to get in touch with a Dartmoors Livestock Protection officer and send her a photo.The officer immediately sent a local farmer out to check on the pony.The pony had actually been trapped between two rocks.The farmer freed him，and he began to run happily around again.

　　Dartmoor has 1，000 or so ponies，who play a critical role in creating the diversity of species in this area.Many people are working hard to preserve these ponies，and trying to come up with plans to find a sustainable(可持续的) future for one of Dartmoors most financially－troubled elements.

　　【语篇导读】　在Haytor附近的自然保护区Dartmoor内有一千头小马驹，这里的小马驹很调皮。游客们喂养小马驹给它们增加了一些不安全隐患，也使得小马驹的一年一度的迁移变得困难。自然保护区的官员们正在想方设法找到一个解决困扰保护区持续发展的最大问题——财政问题。

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