Comment: I'm with

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In reply to comment: Nope (see in situ)

I'm with

Baptist on this one. There is no way to call someone a "sheep" in this context without it being unnecessarily derogatory. It is like the racists who love to spout off n****r, and say they don't mean it in a racist way. Perhaps there is a way for you to not mean either word negatively in your heart, but it is very unlikely the person you are talking to will hear it the same way.