<a href="http:&#x2F;&#x2F;news.discovery.com&#x2F;animals&#x2F;fat-pets-obesity-weight.htm" rel="nofollow">http:&#x2F;&#x2F;news.discovery.com&#x2F;animals&#x2F;fat-pets-obesity-weight.ht...</a><p>- Mammals that live near or with humans, from lab rats to pet pooches, have gotten fatter over recent decades.<p>- Fatter lab animals are the hardest to explain, since their diet is tightly controlled and well documented.<p>- Endocrine disruptors, pathogens or temperature changes might play a role and could also factor into human obesity<p><a href="http:&#x2F;&#x2F;www.bbc.com&#x2F;news&#x2F;health-23970219" rel="nofollow">http:&#x2F;&#x2F;www.bbc.com&#x2F;news&#x2F;health-23970219</a><p>A study showed that transplanting gut bacteria from obese people into mice led to the animals gaining weight, while bacteria from lean people kept them slim.
The findings were published in Science.
Researchers at the Washington University School of Medicine, Missouri, took gut bacteria from pairs of twins - one obese, one thin.<p>The bacteria were then put into mice which had grown up in completely sterile environments and had no gut bacteria of their own.
Mice with the obese twin&#x27;s bacteria became heavier and put on more fat than mice given bacteria from a lean twin - and it was not down to the amount of food being eaten.<p>---<p>Ok, so you may need 1300 calories a day to maintain an &quot;ideal&quot; bodyweight but The Minnesota Starvation Experiment shows that amount of food intake causes severe emotional stress and depression. So yeah