Dogs learn things from each other. My dog never barked till we moved in with another dog. Barking can also be an insecurity thing. If the new dog has asserted dominance then the other may be feeling out of place and wanting to prove itself to you. The best thing you can do is tell her to be quite and when she is reward her. Just make sure u only reward good things in both dogs, many ppl think if they reward 1 dog they have to give the other something to be fair but they have to earn it. Good luck!!

When we brought my parents dog into the house to live. My dog started barking more. We figured it out that my dog was trying to show dominance. Didn't last long because my parents dog was my dogs littler mate. And the oldest born. More or less my parents dog won and no more excessive barking.

YES, IT'S DEFINITLY A DOMINANCE THING....LOL... THEY NEED TO LET THE OTHER KNOW WHO'S BOSS AND BEEN HERE THE LONGEST. AND THEY HAVE NO PROBLEM LETTING THE OTHER ONE KNOW THIS IS MY TERITORTY.....LOL....

THE FUNNIEST THING WHEN SUMMER THE NEWEST ONE CAME IN TO THE HOUSE HOLD SHE WOULD RUN CIRCLES AROUND SOX CHASING HER ALL OVER THE PLACE. I HAD TO LAUGHT BECASUE SOX DID THE SAME THING TO LINDSEY BEFORE SHE PASSED AWAY. NOW SHE'S GETTING A TASTE OF HER OWN MEDICINE....LMAOOOOOOO.. SO CUTE TO WATCH:-)

My dog never used to bark at people all the time, but when we went away on holiday and then came back he barks at everyone that comes into the house. I think he is showing he is the boss.lol