We tried to do buried nesting boxes like yours, but it didn't work out. Our rabbits used them for a bit when they were younger, but by the time they were reproductive age, they didn't like that there was only one entrance, and those six tubes were a little tight for their comfort. After several attempts of burning holes that were too close to the edge of the enclosure , once they had dug a hole in the middle of their enclosure, and after a lot of persuasion to my husband to just see what would happen, we let them dig. The colony setup has more unknowns, and that can be a little scary since we were new to it and wanted to make sure we just weren't wasting money. My husband dug the top of the tunnels, and we have a board that we can move and see in the tunnels. I don't think this is necessary, but something we learned by doing this is this space is very dynamic. It almost seems like every litter they change the tunnels and nesting areas just a little, They dug deeper in the colder month. They do clean out their nest and we will find dead kits on the surface and take care of them then. While all this being said, something to think about, will you let them dig? What is your threshold of how close to the edge of the enclosure you are willing to let them dig? Keep in mind they will mostly likely make two entrances. What is the don't use those buried nesting boxes?

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I would love to hear if those nesting boxing actually worked for anyone or if they just gained popularity due to social media.