My dog walker ("A Nanny For Your Pets" here in Columbus, Ohio) charges slightly different per day depending on how many days per week. For example:
5 walks/week = $15/walk
4 walks/week = $16/walk
3 walks/week = $17/walk
She's bonded and insured and extremely reliable. I give her a key, and depending on how many dogs she's walking that particular day, she arrives at the house anywhere from 11:30AM-12:30PM.
She also dispenses meds, if necessary, has the number for my vet, and all my numbers.
You might check Angie's List in your area for dog walker recommendations, but I agree with mudEpawz: definitely check with your vet(s) and pet stores.
Wendy Maxi, my beautiful girl. Gotcha day 6/5/2014. Birthdate 9/16/2008. Her "new Daddy day" 2/7/2016.