public Pet Create(Pet petToCreate)
{
List <Pet> updatedPetsList = ReadAll().List.ToList();
petToCreate.Id = FakeDB.GetNextPetId();
petToCreate.Owner = FakeDB.ReadOwnerData().FirstOrDefault(o => o.Id == petToCreate.Owner.Id);
updatedPetsList.Add(petToCreate);
FakeDB.UpdatePetData(updatedPetsList);
return(petToCreate);
}