I am in no way suggesting that they are tame or domesticated. 100% they are wild animals. But every environmental center I've gone to literally sells birdseed (temporarily stopped due to bird flu, usually they sell it) and say it perfectly fine to feed wild geese as long as it's healthy (not bread).
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Plus it helps people engage with wildlife & I must admit certainly brings me viewing pleasure seeing the finchs, robins & tits visit my neighbours feeder!