Maybe he's not very curious. Or perhaps he had more than nine lives.
Whatever the reason, at the age of 27, Mischief is one old cat.
A whisker away from officially entering the record books as the UK's longest living domestic feline, he is still purring along nicely.
Cat naps: Possibly the oldest moggy in the world, 27-year-old Mischief sleeps for 16 hours most days
Mischief - with an age of 127 in cat years - is almost certainly the oldest living cat in Britain, and quite possibly the oldest in the world.
His owners put his longevity down to pure laziness.
'People ask what we're feeding him to keep him going so long - they think it must be a diet of vitamins or something,' Donna Thorne, 33, said.
'But we don't do anything special, he is just a greedy and lazy boy who will eat anything that he can get his paws on.
'When he was younger he was fairly active, but now he doesn't move much unless food is involved. I suppose his laziness has ultimately preserved him.'
Owner Donna Thorne says Mischief is a 'huge' part of their lives
She added: 'Every year we think he might slip away but he just keeps going on and on.'
Mischief is fed dry cat food every day and pouches of meat every other day.
He sleeps for at least 16 hours a day and no longer ventures outside of the family's home in St Austell, Cornwall.
Mrs Thorne, a housekeeper, said Mischief was still a 'huge part' of their family and is adored by their 20-month-old daughter, Skye.
Her husband Chris, 51, has owned Mischief since he was 24.
He said: 'I can't imagine what it would be like without having the old thing around.'
A spokesman for Guinness World Records said the oldest cat in Britain was previously Willow, 26, from Shrewsbury.
Mischief lives up to his name in this photo taken in 1983
The oldest cat in the world was Creme Puff of Austin, Texas, who made it to 38.
Calculating how old a cat is in human years is not an exact science.
According to pet food makers Purina, their first two years are roughly equal to the first 25 of a human.
Each additional year equals around four 'cat years'.
At the grand age of 127 (that's 27 in human years), is Mischief the world's oldest cat? | Mail Online