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.
Older rabbits, sometimes referred to as senior or geriatric rabbits, often have special needs and health care requirements. Most rabbits are considered to be seniors when they are 5 or more years of age. Senior rabbit nutrition. Older rabbits are often prone to obesity, dental problems, and other health concerns that can be directly related to diet.