Most animal care and service workers are trained on the job; however, employers generally prefer to hire people who have some experience with animals. Some training programs are available for specific types of animal caretakers, such as groomers, but formal training is usually not necessary for entry-level positions. Animal trainers often need to possess a high school diploma or GED equivalent. However, some animal training jobs may require a bachelor's degree and additional skills. For example, a marine mammal trainer usually needs a bachelor's degree in biology, marine biology, animal science, psychology, zoology, or related field, plus strong swimming skills and SCUBA certification. All animal trainers need patience, sensitivity, and experience with problem-solving and animal obedience.

Certification is not mandatory for animal trainers, but several organizations offer training programs and certification for prospective animal trainers. Most pet groomers learn their trade by completing an informal apprenticeship, usually lasting 6 to 10 weeks, under the guidance of an experienced groomer. Prospective groomers also may attend one of the 50 State-licensed grooming schools throughout the country, with programs varying in length from 2 to 18 weeks. The National Dog Groomers Association of America offers certification for master status as a groomer with a focus on four principle areas, non-sporting, sporting, terrier, and masters. The examination consists of 400 questions with a separate part testing practical skills. Beginning groomers often start by taking on one duty, such as bathing and drying the pet. They eventually assume responsibility for the entire grooming process, from the initial brush-out to the final clipping. Groomers who work in large retail establishments or kennels may, with experience, move into supervisory or managerial positions. Experienced groomers often choose to open their own salons.

Beginning animal caretakers in kennels learn on the job, and usually start by cleaning cages and feeding and watering animals. Kennel caretakers may be promoted to kennel supervisor, assistant manager, and manager, and those with enough capital and experience may open up their own kennels. The American Boarding Kennels Association (ABKA) offers a three-stage, home-study program for individuals interested in pet care. The first two stages address basic and advanced principles of animal care, while the third stage focuses on indepth animal care and good business procedures. Those who complete the third stage and pass oral and written examinations administered by the ABKA become Certified Kennel Operators (CKO).

Some zoological parks may require their caretakers to have a bachelor's degree in biology, animal science, or a related field. Most require experience with animals, preferably as a volunteer or paid keeper in a zoo. Zookeepers may advance to senior keeper, assistant head keeper, head keeper, and assistant curator, but very few openings occur, especially for the higher level positions. Animal caretakers in animal shelters are not required to have any specialized training, but training programs and workshops are increasingly available through the Humane Society of the United States, the American Humane Association, and the National Animal Control Association. Workshop topics include cruelty investigations, appropriate methods of euthanasia for shelter animals, proper guidelines for capturing animals techniques for preventing problems with wildlife, and dealing with the general public. Because shelter workers often deal with individuals who abandon their pets, excellent communication skills, including the ability to handle emotional people, is vital. With experience and additional training, caretakers in animal shelters may become adoption coordinators, animal control officers, emergency rescue drivers, assistant shelter managers, or shelter directors.