I have seen people use wooden faux foxes that they stake in the yard. They also make this sort of flashy ribbon you can put up to scare them away although it doesnt seem to scare all of them. We have lots of geese where I live. I have seen some walk straight into traffic and get hit by cars almost as of committing suicide and then a few of the alphas get aggressive and start half flying and attacking the cars in traffic. Good luck.