Curbing "sibling rivalry"?

[JuJuB]

When we got JuJu he was (still is) our baby and were babied him mercilessly (still do). To date he's been with us for....2-3 months now. 2 weeks or so ago my husband brings home a female rabbit for me that was a rescue. Poor thing was supposed to be snake chow but only escaped at the cost of part of her ear. She's sweet, a little skittish but otherwise very friendly. JuJu DOES NOT like her. Today I went to set Ju in the window like normal (Nibs was out of her cage under the table). All of a sudden he takes a running leap off the window, across our gaming chair, across our table and towards the couch. He didn't jump high enough and landed on the floor. My husband had to catch him and he was bearded out and pissy. So just question is how do we make JuJu OK with Nibbler being around?

 

[Tonja]

You may not be able to make Ju ok with nibbler. With my lizards I slowly allowed the dogs into the room my beardies are housed in. My beardies did not like the dogs and bearded, hissed and all out hated them. When they got upset I got the dogs out of the room and closed their door. I kept slowly introducing them one at a time not both. Geico got to where he would tease Neptune, my border, by running the length of the front glass making him bark. I just kept at it but never let the dragons down when out and the dogs in the room. I would let the dogs sniff them. I had to go very slow, now both my lizards are mothered by both dogs but it took a long time and going very slow. My lizards now climb my dogs and sit on their necks and both go to sleep. I am very careful and very watchful with them when together as it only takes a split second. Emily is so easy going she ignores the dogs. I have since lost Geico but Emmett is warming up to the dogs a bit but still am very cautious. You may have to keep one caged while the other is out and vice versa. I wouldn't at this point from your post allow them out at the same time, one could get hurt. Its all the advice I have for you right now. Just go very slow and one at a time out of the cages.

 

[Goonie]

[Moved from General to Behavior]

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Sometimes they simply don't like one species over another, and even then it's iffy. You have to gradually introduce JuJu to Nibs by allowing him to see Nibs while she's in her cage (and not the reverse). Start off by holding him in front of her cage (at a distance of a foot or so) for only a few minutes, telling him that Nibs is now part of the family and that everything's ok. Then graduate to allowing brief contacts; again, while Nibs is in her cage. Once JuJu's used to seeing Nibs and know that she's not a threat, you can try the next phase of having them out in the same room.

Be warned that this may take weeks to months. It won't and can't happen overnight.
(this was how I introduced my German Shepherd to my then step-daughter's bunny; Hallie (GS) wanted to turn Thunder into a snack; they ended up being best friends)