oh noes! chickens!
you get to pick what your kids do. if that means telling your DAUGHTER, (not the neighbors) not to play with the chickens, do so. if your daughter won't follow your instructions, then don't let her play there.
you can always tell the neighbors, should they ask, about your disease concerns. but it's on you, not them.
it's none of your business if they play with the chickens like pets (many are) or take them to the park. if you're panicking about a potential 'trauma', don't let your kids go with them.
it's just as likely that the dogs will fight with each other and traumatize your kids.
i'm so glad my kids grew up playing with animals, rolling in the dirt, grubbing in streams and climbing trees. i can't imagine being this upset about a kid playing with farm animals.
khairete
S.