It isn’t ideal but it’s temporary and better than a tiny cage. Also it’s important and good that they are getting exercise in a larger space. The one thing I really don’t like is that the bun in the grey carrier set-up can’t see out at all. Maybe you could invest in some x-pens so you could give them more space? I also really like using NIC cube grids to make temporary housing for keeping un-bonded bunnies separate. You can also get really small mesh ones that function as “nose guards” so they can’t nip noses.
Once they are spayed (or neutered if one ends up being a boy), it is likely that you will be able to bond them, so don’t stress too much just yet. It can be a bit of a process, but most bunny pairings DO work out, and the fact that you separated them before a bunny got injured is very good (bunnies can hold grudges from fights).
When they are older, their interactions with your cat will also likely be better. I tend to pen my rabbits when I’m not home for the same reason (my cat can be a bit crazy sometimes. Some tips for good cat interactions:
-play with you cat regularly with toys that do NOT resemble bunnies. so none of those large “kick” type toys
-get a squirt bottle to spritz your cat if he’s getting to predatory towards the buns.
-have a “safe zone” for your bunnies to retreat to that the cat is not allowed in.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.