Mitzi's owner Viv Davis, from Dorchester, Dorset, and her daughter Zoe Randle were desperate to find a way to give her a better quality of life after she lost her hind foot.
Ms Davis said: 'The options were three legs, euthanasia, or give her a chance to walk. We had to give her a chance to walk.
Dr Fitzpatrick, from Godalming, Surrey, added that the implant proved a success when Mitzi was taken off her lead for the first time on Thursday.
'There was always a risk that the exoprosthesis could actually break when Mitzi ran off her lead so this truly was a nail biting moment for me and for the design team as it could have failed spectacularly,' he explained.
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