Two sheep, close-up on heads 2
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Poll Dorset sheep used in veterinary research, August 2000. Please acknowledge joint © Understanding Animal Research/Wellcome Images.
Sheep are used in veterinary research, and the fact that their lungs are similar to those of humans means that they are used to test the efficacy of treatments such as gene therapy for cystic fibrosis. They have also been used in developing treatments for premature babies with immature lungs.