Are redfoots prone to eating their poop about 5 mins after they go? Sorry but I dont know a better way of asking this question. She does that every time if I dont get to her box in time to remove it....
Its called cacophagy, and it is common in a lot of animals, including Red-foots. As long as the tortoises are not on any medications there is no big deal- we find it nasty but they do it all of the time.
They will also try to eat other animal's poo. Not a big deal if it is the poo of animals that are mostly herbivores, but the poo of meat-eaters (like dogs and cats) is not really good for them.
Keep things clean and remove wastes, but don't sweat it too much.