puppy eating feaces

Hi everyone,
I wonder would any of you be able to advise me here? My 16 week old lab has taken to (look away now if your squeemish!) licking/eating his poo. I caught her at it yesterday and I called her off and told her no but she just seemed very curious about it and kept returning to the spot so in the end I took her in and removed it.

Last night she had diahorria in her pen (she never once soiled her pen until this) and also a vomit which has some rope in it which I identified as coming from my mop. Didnt eat as well as normal today and seemed a little quieter but still had her playtimes ect so I didnt think going to the vet was necessary - I put last nights incident down to her eating a string off the mop.

This eve we head off out for some playtime and she does her business and again turns to eat it. I literally had to drag her away from it. Im concerned cos this cant be good for her. Vet wormed her two weeks ago, shes due her next vac in a week or two. Is there anyone who could shed some light on this for me? It has me very bothered

Thanks xx

Thanks Bartlett, I will try that see how it goes so. She is watching to see where I am now before she tries it so she knows Im not happy about it - cute as a fox she is!! I was mainly concerned that her interest in feaces could be a signal to something being up with her health (as well as it being truly disgusting)

xxx