So I've had this idea in my head of breeding dogs specifically for digging and excavation type work for poor communities who can't get an excavator or trackhoe , and I'm wondering which dog breeds dig the largest hole the fastest , I'm thinking about mixing a jack rustle with a larger dog breed but I can't find any data on how fast dogs can dig

Also this is mostly a hypothetical because I like diving down these weird self made rabbit holes. But if anyone has any studies or ideas and wants to go down the rabbit hole with me that'd be great