Inmates are being encouraged to handle a tarantula to ease tension and raise self-esteem.
The 5in spider is taken into jails along with a skunk, a blue-tongued skink lizard and a pair of ferrets.
Experts say animal therapy and handling the likes of Katarina – a Chilean fire tarantula with a venomous bite – can work wonders.
Dale Preece-Kelly, an animal assisted therapy practitioner who runs Critterish Allsorts, said: “The therapy is proven to improve the spirit-mind body interconnectedness, reducing anxiety and blood pressure.”
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The scheme is currently being run at category B jails in Doncaster, South Yorks, and Dovegate in Uttoxeter, Staffs – along with Drake Hall women’s jail in Eccleshall, Staffs.
John Hewitson, Serco Prison Director at HMP Doncaster, said: “The experiences really help prisoners with their mental health."