Laboratory Animal Breeding: Designed for Science
There must have been so many spare dogs around the courts of the time that it was not necessary to breed tasting dogs deliberately for the purpose. In the earlier years of animal experimentation in medical research, during the 19th century, scientists likewise used stray or unwanted domestic or farm animals (and the use of dogs in vivisection without anaesthesia led to the first antivivisection movement across society in Britain and America2). Today, when animal experimentation is the basis of much of the global research effort in genetics and medicine, and animal testing is required for regulatory approval of nearly every product sold for use, more than 100 million experimental animals of vertebrate species are bred for the purpose annually. The large majority of the animals are mice (with rats and fish in second place) and an increasing proportion of them are bred to have some form of genetic mutation.