hah! reminds me of the time when Nala started escaping and I was utterly baffled as to how she was getting out of a four foot tall pen until I caught her mid-escape the third time - something about the corner where the 4' playpen was attached to the corner of their NIC condo was allowing her to CLIMB up the corner, where she would proceed to go over the top and drop four feet down to the ground! fortunately, I took a piece of foamboard that was sitting around and ziptied it to the top of that playpen panel so she wouldn't be able to climb once she got about halfway up and that put a stop to it.
the good news is that it shouldn't be long before she can move back into the kennel - they grow SO fast at that age!
at 9 weeks old, I used my fingers to measure the width of Nala's head and held them up to a NIC grid and concluded that her head wouldn't fit through one of the holes, so I built a 1-grid-tall pen around their dinky store-bought cage for them to play in. they showed absolutely NO interest in trying to jump/climb over the short pen at their young age and tiny size, so I didn't think anything of wandering off for a nap with their cage door still open ><
an hour or two later, I was jolted out of a sound sleep by odd noises coming from the living room - frantic shuffling of bunny feet on tarp. I was out of bed and in the living room SO freaking fast because I just KNEW that something was really, horribly wrong.
Nala had not only escaped from the little pen, she had tried to get back in it by shoving her head through the grid!! she was freaking out; I was freaking out... I went over and pet her and - thank god - me being there and reassuring her got her to sit perfectly still (which alleviated my biggest fear, that she'd hurt herself while struggling). once I had her calm, the ordeal of how to get her head out of the grid began... and it ended at the neighbor's house at around 7:20 in the morning, a few minutes after I showed up holding a tiny baby bunny with a NIC grid around her neck and a frantic look on my face.
anyway, I think by 10 weeks she would've been ok with the NIC, as she'd grown quite a bit... I waited until 11 weeks to even let her near a NIC grid again, though, because I was so paranoid. after watching her try - and fail - numerous times to shove her face through the grid I was holding (I swear, that bunny's so smart and yet so dumb sometimes!), I was finally satisfied that she couldn't get stuck in it again.
TL
R for all that rambling - give it like two weeks, hehe.