I'm very sorry to tell you that this will likely not end well. They're not likely to outgrow it and it's nearly impossible to train out of it. One or both dogs will probably end up seriously injured. Somebody might die. Spaying doesn't make any difference in this regard.
Yes, some pairs of bitches can live together without aggression. I had a pair of them that lived together in harmony. The one time I thought there was a fight I realized it was just a stern correction from the bigger, stronger and wiser Plott hound.
There's a high probability that you will either need to keep them separated at all times (which is difficult, but people do it) or rehome the younger dog.
I'm sorry to paint such a dark picture. Others may chime in to tell you that everything will be fine and just let them work it out.
Yes, some pairs of bitches can live together without aggression. I had a pair of them that lived together in harmony. The one time I thought there was a fight I realized it was just a stern correction from the bigger, stronger and wiser Plott hound.
There's a high probability that you will either need to keep them separated at all times (which is difficult, but people do it) or rehome the younger dog.
I'm sorry to paint such a dark picture. Others may chime in to tell you that everything will be fine and just let them work it out.