Martin Fowler wrote a piece in 2003 that addresses a subtle anti-pattern – developing your domain model code devoid of behavior. It’s a short, interesting read, that is related to the development of fat controllers in MVCish applications: “AnemicDomainModel”:

“In general, the more behavior you find in the services, the more likely you are to be robbing yourself of the benefits of a domain model. If all your logic is in services, you’ve robbed yourself blind.”