How to bond rabbits when one is aggressive?

i just recently added a new bun into my life and my other girl, Miffy, is not happy about it. Miffy is about 9 months old and has been spayed for over a month now, and even still she is very territorial and aggressive when it comes to her space. she will often growl and even lunge when i so much as try to switch out her food bowls, but usually other than the occasional tantrum she’s sweet as pie.

cherry (female, 4 months, undpayed) just joined our family yesterday, and despite the fact that she’s very submissive & docile, Miffy absolutely hates her. I’ve set up their enclosures to be next to each other and Miffy will try to charge at her and growl at her through the bars. what can i do to prevent this behaviour?