
By and large the forum does what it is supposed to and that is act as an 'Information Exchange', hope you sort your little problem out.
Also something worth considering is whether the fod you feed has recently changed it's formulation which could effect teh colour of the faeces.
Also slight bleeding in the rectum caused by a bit of constipation may have colured the faces,a dn then changing the food has caused the slight looseness.
I think getting a stol to the vets is an excellent idea, because if there is a bacterial infection then it can be treated appropriately.