In Georgia, there is scientific evidence that bullying doesn’t just give you a tummy ache, but it literally changes your gut. And not just for the person being bullied, but the one doing the bullying too. Researchers at Georgia State University’s Neuroscience Institute found in their study with hamsters, whose guts are very similar to human guts, that the good bacteria, like Lactobacillales, dropped in both the bully hamsters and the ones being bullied, showing that the social stress and conflict harms both sides. The study also found that bad bacteria, like Clostridium, went up in both types of hamsters. Researchers predicted that bullying was bad for the hamsters being bullied but were surprised to see the negative impact on the ones doing the bullying as well.