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.
Lifestages of a rabbit. The different lifestages of a rabbit, how long they live, how age influences behaviour, and how to care for rabbits from youth to old age... A rabbit's lifespan is influenced by breed, living conditions and healthcare but the average lifespan is likely to be around 8 to 9 years. It can be helpful to think of one year in a rabbit's life as ten years in a human's life, so an 8 year old rabbit could be thought of as approximately 80 years old in human terms.