When kept in captivity, they can be fed mice, rats, rabbits, chickens and chicks depending on the size and age of the individual. Captive life expectancy is 20 to 30 years, with rare accounts of over 40 years, making them a long-term commitment as a pet. Proper animal husbandry is the most significant factor in captive lifespan; this includes providing adequate space, correct temperatures and humidity and suitable food items.