Thanks, Ravn! Note: the connector is called a 6-pin mini-DIN, and the keyboard and mouse connector pinout charts above show six pins, but some mice and keyboards are made with the (male) connector having only four pins (i.e., with the unconnected pin 2 and pin 6 missing).
Use general age categories to categorize the rabbit. This will give you a good way of starting your assessment. A young rabbit is up to 9 months of age. An adult rabbit is approximately 9 months to 4 - 5 years of age. An elderly rabbit is 4 - 5 years upwards. Some rabbits live to be 10 - 12 years of age.
What do Rabbits Eat at These Pet Rabbit Life Stages... Weanling bunnies and youngsters up to adulthood can be free-fed pellets and alfalfa hay. If you plan to supplement rabbit pellets with fresh raw veggies, 12 weeks old is a good age at which you could start doing so. Go easy at first.