Burying her Bones

Hi all! My girl Honey is 11 months and she started out loving yak bones and other busy bones. They were great because they would keep her busy for a little while! I kept buying them and it seems here lately whenever I give her one all she wants to do is take it outside and bury it in the back yard. There must be 20 bones buried out there. Sometimes she’ll dig one up but it’s like she’s just checking to make to sure it’s still there. I’m kind of at a loss. I still do things for her like a Kong and other things but I was just wondering if this is a Bassett thing?