Mother-of-two Clare Farley told ITV News she made the tough decision to have her cat put down when Jasper contracted tuberculosis as it was "terribly worrying".
Ms Farley told ITV News Correspondent Rupert Evelyn, "The fact that the younger [children] are their immune system is not built up yet ... I could not have a cat in the house that could potentially give them a really nasty disease".
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The 18-year-old was shot in each arm and leg during the attack in the early hours of Sunday.
Concerns have been raised that the life-saving service will not be doctor-led as most services are across the world.
Dr Bod Goddard said that at least 6,000 more medical students are needed – on top of the 1,500 the Government has already promised.