What is the difference between a DoG and cOw?

There seems to be a misunderstanding. "DoG" and "cOw" are not standard acronyms or terms with specific meanings. It's possible that:

* You meant to write something else: Perhaps you intended to use different words or acronyms. Please double-check your spelling and try again.

* You're using slang or jargon: "DoG" and "cOw" could be slang terms within a specific community or context. If you can provide more context, I might be able to understand.

Could you please clarify what you mean by "DoG" and "cOw"? I'm happy to help once I have more information.