The frequency of pet-sitting visits depends on the type of pet. A pet sitter should come once a day for cats, fish, and birds. This ensures that the pet's food and water are replenished, and their litter box or cage is cleaned. For dogs, however, a pet sitter should come twice a day. This allows for more frequent potty breaks and opportunities for exercise and play. It also reduces the stress of leaving an animal alone for long periods. Additionally, having two visits per day also helps ensure that the dog's emotional needs are met.