Dosing apparatus comprising a cartridge (11), the cartridge having:—a body (13) with a cavity holding at least one product to be dosed,—a nozzle (17) which is in communication with the cavity and which is configured for channelling the product to an orifice of an animal, and—a recess (21) which is adapted to, or actually does, receive and provide a cover for the nozzle of an identical or similar cartridge.