To be honest, right now, 'the baby' is invading Ellie's area, so its natural she wants to drive her out. Its very, very early days.
Ellie is missing company which is probably why she is wanting attention from you.
Its unfortunate you didn't get an already neutered rescue male, or spayed female, to bond with her because you wouldn't have this interim period, but that's by the by now because it can't be changed.
It would be sad to rehome the baby when she hasn't done anything wrong.
To be honest, right now, 'the baby' is invading Ellie's area, so its natural she wants to drive her out. Its very, very early days.
Ellie is missing company which is probably why she is wanting attention from you.
Its unfortunate you didn't get an already neutered rescue male, or spayed female, to bond with her because you wouldn't have this interim period, but that's by the by now because it can't be changed.
It would be sad to rehome the baby when she hasn't done anything wrong.