How to determine business/travel mileage for mobile grooming business

[swick]

How do I determine business/travel mileage with a mobile dog grooming business? Is it from home to each client's home (grooming is done at clients' homes), or beginning with the first client's home? 

Also, can I write off lunches as business expense on days I am providing services for multiple clients and am going from client to client all day?

[Bsch4477]

Assuming that you don’t have a home office you can only deduct mileage going from one client to another. Travel from home to your first client and from your last client to home is non deductible commuting. 
No, you can’t deduct your lunch expenses. 

[swick]

Thank you for your quick response. I thought as much but wanted to be certain.