The average lifespan for a healthy mini is 10 - 12 years. Some health problems for the breed are shown below.
PRIMARY LENS LUXATION (PLL)
the lens becomes detached from its normal location. This can cause major problems and may lead to blindness
subaortic stenosis, mitral valve dysplasia
may occur at any age
LETHAL ACRODERMATITIS (LAD)
serious inherited skin condition that is characterized by poor growth, immune deficiency and skin lesions on the paws and face
LARANGEAL PARALYSIS (LP)
nerves and muscles that control the larynx cease to function, instead of opening when aspirating or swallowing they remain somewhat neutral
usually present from birth
may be a sign of neurological disorders that may or may not respond to behavioural changes
These tests will help, at least, alert you to what kind of problems, if any, may be expected.