Some of the groups had a dog underfoot throughout, while the others had none.

有部分小组在这个过程中始终有只狗在他们脚下晃悠，另外的小组则没有。

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In all three groups, the owner was accompanied by two people whom the dog did not know.

在所有三组中，主人都由两位狗狗不认识的人陪同。

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Another popular event involves having the dog split six sheep into two groups of three and conducting each group in turn to small pens through a defined course by heading dogs.

另外一种受欢迎的赛事要求由两只牧羊犬参赛。比赛要求犬只将六只羊分成两组，每组各三只，并且轮流两群羊进行控制，使羊群排列整齐地在领头犬只的带领下通过规定的路线。

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"These dog amenities are just the next evolution, " said Robert Marino, president of NYCdog, a coalition of about 60 dog groups in the city.

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You can tell this was a dog whistle because different groups of people heard it totally differently.

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Some groups and dog owners are howling.

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