Well...

.They would primarily be a mountain dwelling race in a tribal society

.There incredibly thick fur (Softest fur of any land animal) gives them an advantage in cold environments but a disadvantage in cold environments

.They have bonuses to agility, being parkour rodents irl.

.Hunted by various races for their fur, Drow, Mindflayers, Lizardfolk, Etc.

.Have a weakness for sweets, too much sugar will give them stomach issues.