They say that the eyes are the window to the soul; in many ways your dog’s poo is a window on their health.
(I never thought I’d see the day when I wrote about poop – but there’s a first time for everything.)
Have you noticed that the color of your dog’s poo changes with what they are fed? For example, if you are feeding raw venison, chances are the poo is quite dark.
If, however, the stool has a noticeably black color such as in this photo, this can indicate digested blood and you should be off the vet for a check (don’t be shy, take a sample with you!).
A yellow or slightly green tone indicates a rapid transit time in the bowel, typical if your dog has had diarrhea, as in below. But consistently soft stools can also be an indicator of bowel disease such as IBD.
A white or chalky color to the stool indicates a very high content of calcium, often found in dogs that are being fed raw with a high bone content. If your dog is passing stools of this color, they are at risk of constipation from the bone material they are ingesting because of the dryness and risk of impaction. In my practice, I am seeing instances of poor mixing of raw foods and it usually from the same supplier – which is why I recommend only certain sources of food to my customers.
If you see bright red blood in the stool, it’s also time to talk to your vet and of course, if you see visible worms than a vet visit is also recommended.
And finally, if your dog passes poos that are a neon green in color, they’ve been exposed to rat or mice poison and urgent attention is needed.
Kathleen Crisley, specialist in dog massage, rehabilitation and nutrition/food therapy, The Balanced Dog, Christchurch, New Zealand
DoggyMom.com 
I once thought there was something horribly wrong with my youngest dog after seeing bright red hard lumps in his poo. As we do I took a stick to prod and investigate closer so I’d either have some to show the vet or could at least tell her what I’d seen if we had to do a 100mph journey to the surgery in my car.
Wax church pillar candles. He’d eaten my sodding candles.
Back when we first got him he was obsessed with picking up, chewing and eating absolutely anything he found and it was worrying to the point of me thinking I needed some extra help tackling the problem but thankfully it did stop and he no longer eats stones, sticks, candles or wooden ornaments.
I’d often spot things amiss with poo namely bright green felt that meant he’d been eating felt from tennis balls but God that day… really thought there was something horribly wrong with his insides.
Wow!
And I’m there with my face 2cm from the pile of poo I’d been poking and prodding with a stick for a good few minutes as my daughter stood with baited breath waiting for me to say whether she should get in the back of my car and ring the vet to say we’re on the way with a dog that’s dying from an internal horrifically terminal looking haemorrhage.
“Oh.. oh no hang on what the….Will you grab the pillar candles off the fireplace I think it’s wax.. is it? IT IS!!! HE’S EATEN MY RED CANDLES!!”
LOL