[Yorkiegran3]

I have 2 Yorkie girls and over the past couple of weeks they have been fighting. Not the usual play fighting, but full on aggression and it takes a lot to pull them apart. Katie is almost 3 and Suzi almost two. Suzi is very small. They normally get on really well. My daughter recently got a boy puppy Odie and has come to live with us. Odie is 7 months. We've had him here 5 months. (He cannnot understand it when they're fighting.)

I've always tried to show them I'm the boss but am at a loss why they are fighting. Suzi was in season 3 weeks ago if she and Odie mated, (we did kept them separate as much as possible. Could pregnancy cause her to be aggressive? She doesn't appear pregnant.

I read on the net that female dogs can fight is this what it is? It's got to the stage when I can see the build up to it. They start staring each other and tails go up. I remove one and take her into another room. Although it's difficult as we are open plan downstairs.

Would appreciate any comments.

Thank you.
Shirl x x