What kind of meds did you use and how serious was the injury? anything with pain relief ending in caine is not safe to use on poultry
what kind of gate are you talking about? get a long pole and when they come towards the gate put the pole out in front and say wait or no or back off but what ever word you decide on use it only. and make sure you don't let them get to the gate before you say it. I use an old mop handle to keep my geese from going after the dogs. I just place it between them and the dogs and tell them no. I also use my hands and arms to guide them from one fenced in area to another when they see me raise my hand and say lets go they automatically start walking towards the gate. It take time and patience but geese are smart and learn pretty easy. and so very sorry for your loss. and