Sorry no advice on how to get her to stop just sympathy.
Reg, my mongrel terrier thing, doesn't eat chook poo (about the only poo he doesn't) but I often find him in the rabbit hutch enjoying the bunny currants :shock:
Plus he positively relishes troughing about in the front garden (which the cat uses as a toilet :x )
If he can't find something revolting to eat he'll find something revolting to roll in (dead things, more poo etc)
Sorry that doesn't help but it makes me feel a bit better to get that off my chest.
Ness