A Sprague Dawley rat is a multipurpose breed of albino rat, used most commonly in medical research and testing. This female is used for breeding and gives birth to six to twelve pups at a time. In this research center, she doesn't have a nest, a surface to lie down on without feces, nor does she have a place to climb or burrow. Although Sprague Dawley rats are highly social animals, they are often housed alone in research settings. USA, 2022. Roger Kingbird / We Animals

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