aww, what cuties!! I especially like the picture of Nibbles.
now with regards to the hopping in your lap, it sounds like they’re really freaked out in the bonding zone. Does it have a slippery floor and they’re used to carpet? My bunnies often do that kind of thing at the vet’s trying to hop off the table and into my arms. The one upside is that they’re both bonded with you and consider you a safe zone 🙂 It may be that you should try standing, rather than sitting or a different location?
When introducing a new bunny – it can change the dynamics of the existing pair. Plus, you’re trying to bond three females, which is really tough.
Just because Peanut is younger and smaller does not mean that she’s going to necessarily accept Nibbles as the dominant one. My guess is that both have dominant streaks and it’s going to hard work to get them to bond.
A lot of people find it easier to bond the two first – like what you’re trying with Zowie and Peanut. There will still be a pecking order, so I wouldn’t assume that Peanut is going to simply demure to Zowie because she’s older. It’s all about them figuring out the social structure and who’s top bun.
I’d definitely recommend car rides, swapping litter boxes / pens, banana on the nose trick and dates with the hoover.
hang in there and let us know how it’s going.