Have You Ever Used A Trainer for Your Dog

I have never used a trainer, although sometimes I wish that I could and think that I should! I wish that I could get a handle on my Yorkies and their yappy annoying barking at every little noise. It definitely is worse if someone knocks on the door or rings the doorbell. I read in another post that someone suggested using a water bottle to spray them in the face. Seems harmless and easy enough. I may give that a try.