No state in the US has any educational requirements for working as a veterinary ASSISTANT. This is an entry level-position in a veterinary facility and training is generally done on the job. Because most training is done on the job it is often very cursory and lacks the depth and breadth of a formal education. Veterinary assistants are generally taught the basic how-to but not the why or when you would do something different. They tend to do basic tasks such as animal restraint, basic care and sanitation, assist in patient monitoring, prepare instruments for use in surgeries or daily treatments, they may give medication as prescribed by the veterinarian, collect biological samples and perform basic diagnostic tests like reading fecals. Veterinary assistants are generally not the equivalent of a formally educated veterinary technician.
There are voluntary educational opportunities, however these are not equivalent to a college degree program and are instead basic vocational training. There is no over-sight by a professional body to ensure that the majority of these programs provide adequate or correct information. There is no requirement for hands-on training and instructors often have little or no experience or education in the veterinary field. There are a handful of certification programs that are designed and approved by veterinary professional organizations or that are offered by colleges which also offer accredited veterinary technology programs and these are better choices for someone who wants to be a veterinary assistant. All of these programs offer certification as a veterinary assistant, but this certification is not legally recognized or required by any state in the US. It may however give you the edge over someone who has no training or experience when you are looking for a job in the veterinary field.