Well, I won't use galvanized anything. When such things are new they are pretty safe. But, the galv does chip off and does leach into the water. or any damp substance.Galvanised anything? Pretty sure the treadle-feeder is galvanised.
Rather than being alarmist think more of the recommendation that one no longer uses aluminum cook ware.
It's just if there is an alternative then that's what I would go for.