the present invention provides systems for the injection delivery of at least two fluid doses to a small bird by penetrating the skin of the recipient bird with at least two injection needles . it is then possible to simultaneously inject drugs , or other fluid vaccines that do not mix well or whose mixture would be detrimental to the stability or efficacy of the active ingredients therein . the present invention provides a novel injection needle support for connecting the injection needles to dose distributors and fluid supply containers while maintaining the injection ends of the injection needles in a substantially parallel arrangement . the injection needle support typically is attached to a carrier connected to an actuator , an actuator power source and a switch mechanism wherein the actuator , when activated , can reciprocally move the carrier and injection support toward and away from an injection position . the injection delivery system may further include one or more dose distributors and fluid supply containers for delivering fluid doses to the injection needles for injection into a recipient bird held against an aperture in a retaining plate .