My you have your hands full right now! As the others have said the dogs can feel you tensing up when they approach you with baby which in turn will make them more interested in the strange new "creature" (no disrespect meant to your adorable baby ).

Terriers are very bright dogs - have you tried getting yours to exercise her brain instead of her legs. Hide treats in toys and things to keep her occupied and burn off some of the excess energy some other way