you could give her loads of attention when the baby is around her, and generally ignore her when she isn't around the baby, so she looks forward to being around the baby and doesn't
not like being around her/him. Every dog has a different personality, maybe is is just Zena's thing to want to be in the lime-light all the time.
Im so happy for you congratulations on the new baby!!![/COLOR]
I hope it all goes well, and keep us updated
Soter