Dear Rhona,
Don't underestimate the scavenging tactics of the average Cocker!!
I can well rememebr nearly passing out when I saw what Barley had passed one morning - it was green, red and black and I thought she was DOOMED !!!
It turned out that our kindly PostLady had taken to carrying round cat and dog treats (to ingratiate herself with the animals on her round - and who can blame her) and the dog treats were the chew stix that come in different colours!!!
Many things that look very innocuous can contain colourings and it is not uncoomon for them to throw the odd orange/green poo (much to our horror!!).
I hope that this is all that has happened and that everything reverts back to normal soon !!!