为啥猫咪不在猫砂盆拉屎

如题，家里一只加菲弟弟一只布偶妹妹，弟弟一岁妹妹八个月，两个猫砂盆

最近两个月，妹妹总在猫砂盆旁边拉屎，拉尿倒是在猫砂盆里

尝试过关小房间，小房间放猫砂盆和吃喝和玩具，关了三天，在猫砂盆拉屎了

放出来没两天，又只在猫砂盆旁拉屎

猫砂换了好几种，豆腐，膨润土，两者混合
都没有改观

我都懵逼了，到底咋办捏

崽子图
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