Descriptive fields:

Users:

• ownedPetId : ids of pets user owns
• caredPetId : ids of pets user is caretaker for
• caretakers : ids of caretakers who take care of user's pets
• sitterForUser : ids of other users for whose pets this user acts as caretaker for
• coOwners : ids of other owners of the same pets

Pets:

• caretakerId : ids of users who act as caretakers for this pet
• ownerId : ids of users who own this pet

Tasks:

• userId : ids of users to whom the task is assigned