I am a professional dog walker/sitter. I had 10-12 regular dogs and was trained to take care at least 20. There were dobermans, shepherds, labs, retrievers, poodles, Newfoundlands, St. Bernard, shitzu's, mutts, pitbulls and more.
I was given instructions by the owner, they ranged on a half hour walk, feed them, crate them, medicate them and play with them.
When I pet during Saturday, it was 7 a.m. - 7 p.m. I prepared all meals, check on them during preference time and stay over in the guest room.
My family also owned and cared our beloved family pet for 17 years before she passed. Also I grew up as a animal lover and often cared for neighbor and family pets voluntarily.