Indoor pets, like birds or cats, don't require registration but cities want to keep track of dogs because they are more likely to go outside, where they can form wild packs and spread disease.

室内宠物，比如小鸟猫咪，不需要办证，但是市民希望给狗登记造册，因为他们更可能出现在户外，突然发狂或者传播疾病。

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Some raise small dogs or cats as their pets while others raise various birds or fishes as their pets.

有些人养小狗或猫作为宠物而有些人则饲养各种鸟类和鱼类为他们的宠物。

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Some raise small dogs or cats as their pets while others raise various birds or fishes as their pets.

一些人养小型犬或猫作为自己的宠物，而另一些人则饲养各种鸟类和鱼类做为他们的宠物。

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