PDSA lists an approximate Maine Coon lifespan of 12 to 15 years. An individual may live for a shorter or longer time depending on health, genetics, environment and care. Use those ranges for long-term planning rather than treating a particular birthday as a deadline. Budget for routine veterinary care throughout life and reassess equipment as mobility, vision or preferences change. A cat that once loved a high perch may later appreciate easier intermediate steps and a comfortable lower resting place.
Those changes do not justify assuming that every new behaviour is simply old age. Reduced jumping, changes in grooming or altered appetite deserve attention from a vet. Keeping a record of normal habits can help you spot a change earlier and explain it clearly during an appointment. Keep vaccination records, previous test results and medication details together, so a new practice or holiday carer can understand the cat's history quickly.
For product comparisons alongside this advice, see Velvet Nest and Sterling Court litter tray. The details below explain their sizes and uses.
Further reading: gccfcats.org; pdsa.org.uk.
Velvet Nest
Sterling Court litter tray
Taj-MeowHall