Even though Tucker is a mix.. I think he is silky/toy poodle mix and not yorkie/toy poodle mix. He has a longer snout, similar to a silky but not a poodle and he definitely more "stockier" than a poodle or a yorkie and he wieghs more than a yorkie or a smaller toy poodle should. He parents were very small, 4 pounds and he is 9 to 10 pounds, all of his siblings are all under 4 pounds..so it really doesnt make much since..lol.. anyways, your Nikki, is beautiful!!
