What does Ezekiel 4:15 mean?

Then he said unto me, See, I have given thee cow’s dung for man’s dung, and thou shalt prepare thy bread thereon.

Then he said unto me, Lo, I have given thee cow’s dung for man’s dung, and thou shalt prepare thy bread therewith.

Then he said unto me, See, I have given thee cow’s dung for man’s dung, and thou shalt prepare thy bread thereon.

Then he said to me, See, I have given you cow's waste in place of man's waste, and you will make your bread ready on it.

And He saith unto me, `See, I have given to thee bullock's dung instead of man's dung, and thou hast made thy bread by it.'

And he said to me: Behold I have given thee neat's dung for man's dung, and thou shalt make thy bread therewith.

And he said unto me, See, I have given thee cow's dung for man's dung, and thou shalt prepare thy bread therewith.