I had two dogs, one from 6 weeks, both till they passed. I worked for a local service for a while. Molly was a border collie /Australian shepherd mix who was cuter and smarter than me! Underdog came from my grandma. Depending on her day, I'd also call her Blunderdog or Overdog (chain-link fence). I worked for a local pet sitting service for a while. I did twice - daily visits for some individual or pairs of pets or families, out of their four for a day, residents of very busy high - rise apartments. I had several overnight stay clients, which were never in conflict with daily walks or meals. What's not to love about clients that only need love, attention, food, and walks? Only scheduling makes it a job!