Hi there,
I know this reply is a little to late, but there are two possible reasons why your *** was eating other dogs poo, its more than likely the reason she is doing it is because she is low on nutrients, i would make sure she is on a good puppy diet whilst feeding the pups. Also it can be a behaviour problem, which can be resolved by associating eating poo with a bad experience, try a firm NO, if this doesn't work try filling a plastic bottle with a few pebbles and when she goes to do it shake the bottle near her and again firmly say no, and she will associate eating other dogs poo as a negative experience.
Its not just something dogs do! there would be a reason for her doing it, its just a process of elimination to find out wheat it is!
Hope this helps!!