The violence of the series is not all that bad, and lots of it is comical. Colleen fights bad guys and uses karate moves on them, no blood is shown.
Frequently in many episodes, Muzzle is set on bad guys and mauls them, the maulings are off screen, but we hear everything from screams to growls and biting sounds. The other Road Rovers comment on how terrible it is to watch, usually covering their eyes and turning their backs.
In episode 3, the Rovers are attacked by wolves, Colleen and Exile are scratched, no blood is seen but there are claw marks on their shoulders. A wolf drools all over Colleen as well.
In one episode, Shag cooks all the Rovers' meals in toilet water unbeknownst to his fellow teammates who are enjoying the meal. They later find out and all start retching and gagging.