I agree with others about growing up, but I will also say that if you have to pick her up every day to return her to her pen, that will likely harm your relationship eventually.
It’s best to only pick up buns when needed for nail trims, deep grooming, etc. Since she’s growing up, she could be starting to get annoyed that when you pick her up, it means play time is over, so it’s a double-negative (being handled and no more playtime).
Is there a way you can lure her back to her pen with food? I usually will feed my buns their salad or pellet ration in their pens to get them to go back in when I need them to. Usually a shake of the pellet cup is all I need and they come running!
You can also add some safe enrichment activities in the areas she digs. Block off the problem spots with NIC cubes or tiles, and add a digging bog, cardboard cat scratchers, or grass mats. Some destructo-buns also love shredding phone books.
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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.