Couldn't you hire her out to the dog warden??!!

In the Park I go to pick up after my dog and am frequently confronted by some child telling me to do it in a dreadfully supercilious way. I have to stifle the urge to bag the child instead.
Can`t you just tell her that it`s not her job?

WOW another one, i think we are well on the way to finding our mini ninja park wardens of the future. and they sound like they are on a mission, BRING UM ON.

I think it`s more likely that some children are being made over-anxious about `dirt`. (Not a dig at you - just a general observation)
Provided the child is taught to wash hands before eating and practice reasonable hygiene they should survive to adulthood. Children have grown up around livestock for centuries, and the race hasn`t died out.
Faeces are not a major threat - in my local park you`re just as likely to come across broken bottles, discarded nappies and ancient picnic remains. Other children may pass on all sorts of nasties in casual contact, from headlice to Impetigo.
Maybe ignoring this behaviour and encouraging the little girl to get her hands dirty with a bit of gardening might work?

I suggest the distraction technique would work best to be honest

Three year olds do get the oddest obsessions don't they My son was obsessed with keys, all sorts of keys and any keys. He'd pick them up anywhere we were. We had loads of them lying around the house for ages.

He did eventually grow out of it, and became obsessed with bones instead...

I agree, infact her tomato and strawberry plants are coming on a treat, she deffo has green fingers, and as you said as long as she washes her hands after she should remain healthy (apart from the usual possible childhood gripes)

BONES?????????????