My 18 mo DD is very allergic to dairy/eggs (epipens at the ready if she eats a lot), and I would hope that, given how many kids are allergic these days (and just as a matter of courtesy in any case), other parents wouldn't give her food to eat without quickly checking with me first? Obviously when she's old enough to know what she can/can't eat its a bit different, but at this age she'll eat anything given to her (especially the dairy/egg stuff which tends to be the nice looking chocolate goodies).
Would most of you check before offering a snack to a child at a toddler group/coffee morning etc? I would have assumed so, but if I'm being unreasonable, I'm going to have to get more over protective from now on. I've tried to be quite relaxed about it until now, so DD doesn't get food 'issues', but at a coffee morning today another mum gave my DD a buttered hot cross bun, so I had to look like a paranoid mum leaping across the room going 'nooooooo' - admittedly she was only a mum of a tiny newborn, so I don't blame her for not really thinking about it, but I would hope/expect that more experienced mums would check before offering? Is that unreasonable?