... pain because they receive either anesthesia or painkilling drugs. In a few experiments (7 percent) anesthesia and pain-killers must be withheld because they would obscure the results of the research. An example of such research is the study of pain, itself a major human health problem."" (1) Another myth that also shows concern is, most research animals are dogs and cats. The fact is ... percent of the animals used in research are rats and mice and other rodents. Dogs and cats account for less than 1 percent of the total but an important 1 percent. For example, dogs are essential to stu...

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