When I pet sit your dog, I come to your home, feed your dog(s), change the water on each visit, pick up poop, give treats, give any meds needed, and best and most important of all, play, give belly rubs and love to your dog.
With cats, I feed, change water on each visit, give any meds needed, give treats (yes, cats love treats too!) clean the litterbox, and best of all play and pet.
I leave you a detailed log of our fun while you were away.