Unless you want to tell how you incited your pit bull to vomit on someone’s shoes, don’t write “sick ’em” or “sick the dog.”The standard spelling of the -ing form of the word is “siccing.”In a different context, the Latin word sic (“thus”) inserted into a quotation is an editorial comment calling attention to a misspelling or other error in the original which you do not want to be blamed for but are accurately reproducing: “She...