Make sure all your pigs have their own hiding places, food bowls, and water sources. This can help alleviate stress and competition for resources, and could stop the barbering behavior.
[header] How to stop barbering in guinea pigs [title] Look for causes of barbering. [step] Identifying the cause of barbering can help you figure out how to stop it. Stress, boredom, or competition for resources can all lead to barbering.