你们都是烦恼猫太肥我却(内有大量猫图)

我的猫1岁了，才6.4斤。原来吃发育宝还有7.4斤，后来换了now和金素就瘦了，换粮也有4个月了，大便正常，精神正常，每3个月驱虫一次，从不出门，家里就一只猫，就是瘦了。求助求助
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