Ive just begun to pre bond 2 buns because we couldnt get cages and put them next to eachother, instead we let one out into the room and kept the other one seperated with cage bars. The male bun always grunts and lunges both at me and the female bun when she gets close (there is a bit of space between them so he cant hurt her), he digs and chews the cage as well. I thought that this was some sort of territorial behaviour at first, but it could be something else? The female was spayed 2 weeks ago (I read that you should wait 2 weeks before you can put them together). So I was wondering if I should start the bonding now (because its been 2 weeks already), or should I wait and do pre bonding until they tolerate eachother (the male not grunting or lunging through the cage)?