Final answer:
The name of the dog walking service Marisol and Jackson made up is not explicitly mentioned in the provided information.
Step-by-step explanation:
The name of the dog walking service that Marisol and Jackson made up is not explicitly mentioned in the provided information. However, based on the context, it is implied that the dog walking service is part of Marcus's dog hospital. Marcus and Jackson took several dogs from the hospital out for a walk to the Cliff House. The fact that they had to walk all the way back home because the dogs wouldn't follow suggests that the service was not successful. It is important to note that the exact name of the service is not mentioned in the given passage.