According to 'Discover Neem'¹·: "Neem oil shampoo for dogs keeps fleas, ticks, mange mites and any other annoying biting insects away, and generally promotes a shiny coat and healthy problem free skin. (Just like using neem products on your own hair and skin does.)
The neem leaf is a powerful herbal supplement that strengthens the immune system in general, supports liver function, purifies the blood and may eliminate intestinal parasites. Considering that most dogs eat commercial dog food, such a herbal supplement is a good idea."
Ingredients: Purified Water, Sodium Laureth Sulfate, Lauryl Glucoside, Cocamidopropyl Betaine, Sodium Chloride, Propylene Glycol, Diazolidinyl Urea, Methylparaben, Propylparaben, Citric Acid, Disodium EDTA, Aloe Barbadensis Leaf Juice, Argania Spinosa (Argan) Nut Oil, Cocos Nucifera (Coconut) Oil, Persea Gratissima (Avocado) Oil, Neem Oil
¹ https://www.discoverneem.com/neem-oil-for-dogs.html