Mara the Lioness domesticated dog. Along with animal lovers, naturalists and experienced game wardens, they held the belief that integration back into the wild would harm Mara, rather than benefit. Mara did not fear man and indeed went out of her way to approach and play. This posed an enormous risk to her safety. In addition, release into the wild would place Mara and the other lionesses at risk of contracting "Babesia". Domesticated animals have no resistance to the fatal disease, a fact which George and Joy Adamson knew. Their lion Elsa had died of the same disease not less than two years
Joy Adamson book of her paintings, "Joy Adamson's Africa", was published in 1972. She rehabilitated a cheetah and an African leopard. Pippa the cheetah was raised as a pet and given to Adamson at the age of seven months in hopes that she could also be released. Pippa had four litters before her death. Adamson wrote "The Spotted Sphinx" and "Pippa's Challenge" about Pippa and her cheetah family. Later, Adamson reached her goal of many years, when she obtained an African leopard cub. Penny was eight weeks old when a ranger acquaintance of George Adamson found her in 1976. Penny had a