Jim, if you read my reply im sure thats what i said, nothing like stating the bleeding obvious!!!
I cannot believe you would consider a patch, if a custy asked for your help to get them out the poo, then yes but not to get yourself out of it !!!When you start to cut the carpet you are damageing the carpet further.
I asked Rob if he could retuft, if he could then he would know if it was too big to get a good result.
Rob
iv never used colourd pens (well not proper ones....shuuuush) so i cant comment
Good luck
regards
Daryl