Rather than tell the kids to come away and oh that's not nice, explain to them and teach them that things like that happen in the wild (I know it's a zoo but) Maybe they did when they got home or back to the classroom.
Been watching the snooker semifinals yesterday/today, some good snooker being played and it's nip and tuck in both games. But it's stuff for the purists, there's not the sense of excitement you get when it's top ranked players on show. It's lacking a bit of glamour and might not attract new fans imo. Suppose it's a bit like an FA Cup Final between say Palace and Bournemouth.