Two layers here:

• Premises: A delivery driver is typically an invitee. You owe a duty to take reasonable care (clear ice, salt, fix hazards, warn). The 2023 change means you can’t rely on “open and obvious” as a complete defense. 
• Dog bite: Michigan has strict liability for dog bites when the victim is lawfully on the property and didn’t provoke the dog. Prior viciousness isn’t required. That can make the dog-bite portion of the claim straightforward even if the slip-and-fall issues are disputed. 

If the driver is on the job, their workers’ comp may cover them, but they can still bring claims against the homeowner.

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