An all human-grade AviCalm bird food supplement, Avitech AviCalm Calming Supplement can help your birds during stressful times to reduce aggression, feather plucking or picking and screaming behaviors especially successful when used in conjunction with Featheriffic. Avicalm is non-toxic and cannot be overdosed and is FDA listed as safe for food. Avitech discovered the benefits of theanine with birds and have offered it to the avian community to help their parrots. They found through research that their Avicalm can calm down birds enough to help them stop feather plucking especially when used in conjunction with Featheriffic sprinkled on their food and Feather In Anti Pick Treatment sprayed on their dry or irritated skin . The lecithin in the Featheriffic boosts the effectiveness of the Avicalm and the B vitamins, flax and amino acids in the Featheriffic helps grow feathers back with the Feather In sprayed directly on the bird's dry or irritated skin. Birds who are on Avicalm are not in a druggy, foggy stupor but are calmer and less stressed. This state can lead to less biting, less plucking and less overall aggressive behavior. The active ingredient L-Theanine is combined with maltodextrin, a non-sugar food-grade carbohydrate to provide an easy dosing regime as follows: Small Birds (Cockatiels, Budgies, Finches, etc) - 1/8 teaspoon every 8 to 12 hours Medium (Amazons, Greys, Pionus) - 1/4 teaspoon every 8 to 12 hours Large Birds (Cockatoos, Macaws) - 1/2 teaspoon every 8 to 12 hours