There are two species of lice that infest dogs:

Dog lice are annoying, stubborn and sometimes itchy, but they are not harmful to your dog.
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Treatment of lice and mite infestations are most commonly performed using topical therapies. Some monthly topical parasite medications also prevent and/or treat lice and mites. Talk with your veterinarian about medications and the parasite risk factors in your region in order to develop an adequate parasite prevention plan for your dog.
Symptoms of lice infestation in dogs can include one or more of the following:
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Lice infestations and colonization is more common in the winter months, beginning in the cooler months of fall and on into the early months of spring. Dogs and cats living on or near farms and ranches seem to be more at risk. Lice dog sat on the reception rug, some lice fell off, next dog sat there as well - yupe.
Photo provided by Flickrof How to Get Rid of Dog Lice was reviewed by  on March 23, 2017.
Photo provided by FlickrLice are ‘species specific’…meaning dogs may have dog lice, BUT you or I can’t get these..
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Lice, also known as canine chewing louse, are terribly unpleasant for your dog. Lice can be very irritating, especially in heavy infestations, but the good thing is that canine chewing louse are not transferable to humans. However, when it comes to your dog, these parasites tend to cause health problems and discomfort if left untreated. Thankfully there are several natural remedies that you can offer to your pet to get rid of this annoying and itchy problem.Your dog will show signs it is suffering from a problem. When it comes to lice, your dog will exhibit several symptoms you will easily catch and understand. As a responsible pet owner, you have to take the necessary steps as soon as you find that your dog has a problem with lice.Scientifically known as Trichodectes canis, lice are also referred to as chewing lice or canine chewing louse. Unlike other creatures in the animal kingdom, males are usually smaller than females. Females possess a special organ that looks like a couple of bowed appendages on either side of her genitals. This organ helps stick the eggs to the host’s fur as well as to grasp and hang on to its fur. Interestingly, the female can lay up to 100 eggs, or nits, at a time, and will proceed to glue each one onto its own strand of hair. There are two types of lice that commonly affect dogs. The first type survives by scraping off and eating flakes of their host’s skin. The second type feeds on the dog’s blood. Both types of lice can be found on domesticated and wild canines around the world. Dogs that receive proper and regular grooming have a smaller chance of encountering lice, whereas dogs that are undernourished and not taken care of are more likely to suffer from this problem.As always, use caution when applying tea tree oil to cats or small to medium-sized dogs because of their sensitivity to essential oils. Remember also that tea tree oil has been effective in killing lice at concentrations of only five or 10%, so more is not necessarily better.Whether a dog is infested with chewing lice or sucking lice, treatment is pretty much the same. The chewing louse nibbles on the dog's skin, whereas the sucking louse makes meals of canine blood but doesn't chew. Signs of infestation are the same: scratching, poor coat quality and hair loss. Take your dog to the vet if he exhibits any of these symptoms for diagnosis and treatment.Although dogs tend to scratch and lick themselves multiple times a day, you will be able to tell when it gets out of control. One way to tell that your dog has a problem is when you find it excessively scratching and licking itself. The reason for this is that lice will bite its skin, causing extreme itchiness and discomfort. Additionally, your dog will lick itself more often than usual. This is because its saliva offers temporary relief from the itchiness. Similar to you dousing cold water on a mosquito bitten area of your skin, dogs will lick themselves when they feel bothered and itchy.