did they meet on "neutral ground"? bia is protecting "her home" and she sees the new puppy as infringing on her turf. . . It takes time for them to warm up to one another (my moms dogs HATED my yorkie, but now their dog chases him all over the place playing
) when she is not mean to her maybe you could give her a treat or praise? pet both of them at the same time and praise praise praise... honestly, with every dog i have ever had (we have had two at a time at ALL TIMES in my childhood and would introduce them when the other is middleaged) well anyways, we just didnt worry about it, we figured they would warm up to each other eventualy