Animal Care Needed

I'm looking for a great walker for 2 tiny, very easygoing and adorable dogs. Job includes playing with and exercising my pet(s). Non-smoker. One dog is older, but it's important to keep her moving. She can be bribed with treats. She needs to walk on grass due to health issues (has spine and knee issues and will sometimes drag her back feet, hurting her knuckles. So walking on grass is softer and doesn't cause sores and also provides sensory input to help her not drag). So I find a grass area at a school, park, church, cemetery and do laps or walk back and forth for the hour.