Do you remember a TV programme where people were asked to nominate things they could do such as recognise cars just by their lights, or by the sound of the door shutting?
I reckon I could go on there and tell you what a dog had eaten by the colour/consistency of its poo!
Having had dogs for ***** number of years and had boarding kennels, and always been the one responsible for picking up at the end of dog shows, I have become an expert in the art of recognising all manner of poo.
After all its only re-cycled dog food! (And it only becomes dog food when you feed it to a dog!).