OatMella All Natural Pet Shampoo, Gallon Groomer's Edge OATMELLA Professional Shampoo combines the traditional healing properties of oatmeal, melaleuca (tea tree oil) and aloe in a rich, therapeutic shampoo for a natural skin-soothing treatment. OATMELLA helps calm itchy skin and exfoliate dry flaky skin cells. The unique formula helps to eliminate odors often associated with skin irritations. For use on dogs, cats and other animals. OATMELLA come in a concentrate formula and can be diluted to an 8 to 1.