How can I do?

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I has a dog.It goes with our 10 years .Now my mother and it lives in my hometown,but I work in anohter city,near far from my hometowm.Lately I want to ask my mother lives in my work city.But my mother says,if I go there,how can the dog does?nobody feed it and nobody looks after it.My work city dosen't allow to feed pets.And the dog sometimes can bite at someone when it feels nervous.And I like the dog as my family.