Rabbit projects are suitable for youth of all ages from urban, suburban and rural communities. Lessons include all aspects of rabbit management and the science behind it. Young people learn about animal care, health, nutrition, physiology, breeding, genetics, housing, behavior, record keeping and presenting themselves and their animals to the public. Some participants may choose to enter their rabbits in shows and fairs or to produce meat and fur, but neither activity is required. Students may be challenged by the many-faceted Rabbit Science Decathlon, held each year at the State Fair and similar exercises held in many counties.

Cavy projects are a rapidly growing program that is appropriate for all 4-H members from age 5 to 19 and from the inner city to the most remote rural areas.