dog doesn’t eat dog字面意思是“狗不吃狗”，即同类不相残，同行不相害。

【例句】

As the proverb goes: "dog does not eat dog." they compromised with one another fina* y.
正如谚语所说：“同室不操戈。”他们终于互相让步了。

This is the ancestral precept of “dog doesn’t eat dog”.
“同室不操戈”这是祖训。