Humans are genetically very similar to rodents.
Like, rodents metabolise fat the same way as humans do. They can get diabetes on a bad diet. While bear can be fat and healthy without leading to diabetes or other metabolic disease thanks to a protein in their fat cells that decouples weight gain and insulin sensitivity. https://www.sciencemag.org/news/2014/08/how-fat-grizzly-bears-stay-diabetes-free
Other similar psychological and physical traits can also be observed from rodents’ daily behaviours due to our similar hormonal and nervous systems.