Whatever you do, do NOT say "no bite give kisses!" Unless you want to be a doggy pop the rest of your life LOL (see my thread Mr. Licky Lickerson
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I got Pixel to stop nibbling by squealing "ouch" and then saying that, but now all he does is kiss me constantly! It worked though, so maybe try the "ouch" and ignoring for awhile part, and leave out the give kisses part.