What is a vets assistiant?

Because there are many procedures which must be carried out on patients in a veterinary facility which require more than one person to perform. Generally it is because an animal requires restraint for a procedure to be performed.

It is also because there are many tasks in a veterinary facility which do not require a degree in veterinary medicine to perform so rather than having a veterinarian perform these tasks and waste time that could be spent doing those things that only a veterinarian may do, they hire non-veterinarians to help out.