Specifically formulated for small dogs, cats, medium and large dogs. Tasty! Chews are the most preferred delivery option: easier to administer to environmentally stressed animals. Concentrated formula-high levels of L-Tryptopan (122mg per chew for med/lrg dogs and 66mg for small dogs/cats) & requires minimal dosage. Capitalizes on Tomlyn® expertise in this category to offer the best formulas. 100% Satisfaction Guaranteed!