There are several potential reasons why your dog might be engaging in this behavior:
Underlying Medical Conditions: Skin irritation, allergies, or other underlying medical conditions can lead to excessive licking or chewing of the affected area, which may result in hair loss. If your dog is repeatedly chewing on another dog's hair, it is important to rule out any underlying medical issues by taking them to a veterinarian.
Stress and Anxiety: Stress and anxiety can also manifest as compulsive behavior, including excessive grooming or barbering. Dogs that are feeling anxious or stressed may engage in this behavior as a way to soothe or calm themselves. Changes in routine, separation from their owner, or exposure to stressful environments can all be contributing factors.
Boredom and Lack of Stimulation: Dogs that are bored or lacking in mental and physical stimulation may turn to barbering as a means of entertainment or as a way to occupy themselves. Providing your dogs with adequate exercise, mental stimulation, and enrichment activities can help reduce boredom-related behaviors.
Social Dominance: In some cases, barbering can also be a form of social dominance. Dogs that are assertive or dominant may engage in this behavior as a way to assert their authority over another animal.
Learning and Imitation: If one of your dogs sees the other dog chewing on its hair and receives attention or a positive response from doing so, it may learn and adapt this behavior as a way to get attention or interact with the other dog.
Redirect the Behavior: If you observe your dog engaging in barbering behavior, try to redirect their attention and engage them in an alternative, positive activity such as playing fetch or providing them with a treat.
Provide Mental and Physical Stimulation: Ensure that both of your dogs are receiving adequate exercise and mental stimulation to prevent boredom and reduce the likelihood of them engaging in barbering or other compulsive behaviors.
Manage Anxiety and Stress: Address any potential sources of stress or anxiety that may be contributing to the behavior. Consider training exercises, crate training, or providing a calming environment to help minimize anxiety.
Consult a Professional: If the behavior persists or is causing distress to either dog, it may be beneficial to consult with a Certified Professional Dog Trainer (CPDT) or a veterinarian who specializes in behavior to further assess the situation and provide tailored advice and solutions.