An animal feed supplement includes fish meal as a source of omega 3 long chain fatty acids for inclusion in the diet of an animal. The fitting comprises a body defining one or more sockets for receiving an end of a pipe, a clamping nut and a grip ring. Other embodiments include a method of connecting the apparatus to a pneumatic gun, attaching the fluid hose to the fitting, and firing the gun. A dust box is used for collecting the dust and is detachably disposed in the air conditioner to clear up the dust in the box.