These are examples of pet rats being aggressive. They are posted to alert people interested in helping introduce new rats to old rats, what problem behaviors look like, so we can stop the behaviors from happening. These rats were not being introduced and the owner said they were in fact cagemates. However, these are still aggressive behaviors between rats.
![](https://s2.save4k.ru/pic/XbLqCt0Saog/mqdefault.jpg)