The WellPet Vets' practice is situated in a Midlands city. It employs four veterinary surgeons (vets). Being a city-based practice the clients are owners of domestic animals such as cats, dogs, caged birds and so on. The clinic is getting more and more clients and plans to expand soon. A record is kept of the owners who have registered their pets with WellPet Vets. Details recorded include the owner's name, address and contact details; the pet's name, animal type (for example: dog, cat), pet's date of birth and date registered with this veterinary clinic. Details of any treatments prescribed for pets are kept, including the date prescribed, which vet was involved, and any necessary notes. There are a number of standard treatments (for example, injection against cat influenza, clipping dog claws, de-worming, putting an animal down) each of which has a code and a description. A treatment may also consist of an operation on the pet (for example, neutering, tooth extraction, removal of cancerous mass, etc).