2. Do not use tea tree oil to treat skin conditions in pets.
Tea tree oil causes nasty contact allergies in pets, up to and including neurological reactions. Never put human acne medications on your pet. Human skin is much more acidic than pet skin, and using any human skin or hair products on your pet — including shampoo — can cause contact irritation.
Natural remedies for hot spots and allergies include Epsom salts. The healing properties of Epsom salt have been known for generations. Gentle soaking of just about any infected area of skin with Epsom salts — including feet, feline acne, hot spots and more — once or twice daily, discourages infection, reduces swelling and promotes healing. Epsom salts are available at any local pharmacy.
To apply, use a folded cloth applied gently to the affected area. If the hot spots are under the feet, soak feet in a saturated solution by adding as much of the Epsom salts to a warm/hot bowl of water until no more will dissolve. Soak for five to 10 minutes. Do not let your dog drink the water.