I remember when I was a kid I would sometimes produce green turds. I don’t know why. Hasn’t happened in a long time.
Has anyone produced a more exotic colour of excrement, foecal or otherwise?
There were a couple I was modded for.
Eat some generic Fruit Loops to relive your childhood.
you probably ate or drank something with blue or purple food dye. yes, it turns things green as they exit.
So to speak.
Try eating something with black food coloring, like an “over the hill” cake, or icing in school colors that include black. As a baker I can tell you it’s not true black, but a green or blue so dark it looks black.
What that does to your output is enlightening.
The green happened to me as a teenager after eating at Jack-in-the Box. Have eaten there many times since with no issue.
Burger King had black-bun Halloween Burgers. The results were impressive.
I haven’t had Froot Loops in a long time; gotta go scarf a box!
I once extruded a very, very long one, maybe a cubit and a half in length. Damn impressive. Longer than my descending colon; that one was coming from the transverse colon.
(“When he spoke, many envied his words.
When he shat, many envied his turds.
And when he died, many envied his funeral.”)
The first time I made roasted beets I was surprised how good they tasted. I ate a lot of them.
The next morning I almost screamed in the bathroom. Then I put two and number two together.
Black licorice or a LOT of Guiness will give you the black poo.
For added fun, try being on Lactulose like I am for my cirrhosis. Dear God I’ve never met a laxative so powerful (and that tastes like condensed artificial Karo syrup it’s so sickly sweet).
One of our kids once produced a white turd. That is apparently a sign of a blocked bile duct. The next one was back to normal.
From some medications I have had some amazing colors of urine but I can’t remember any really noteworthy poo.
Yes, taking too much diurex produces a pretty blue-green color.
I once looked in the toilet to find my turds forming a perfect number 13. Taking it as a sign, I played that number as my powerball number. Alas, the prediction turned out to be pretty crappy.
FYI, if you are an adult who is regularly producing green turds then you probably need to take a look at your alcohol consumption. I know that this post is not directly relevant to the OP, but a cousin of mine just spent 5 days in the hospital with pancreatitis and was told that the green stuff was a warning sign that he should have heeded. Just throwing this out there, as it was a very painful and expensive ordeal for him that I wouldn’t wish on my worst enemy.
Honestly, I’m disappointed. I thought someone here would have produced some truly exotic excreta. Has no-one here had worms and shat something which still yet lives? Has no-one shat blood or come? Has no-one produced multicoloured shit like toothpast from a tube? Has no-one produced enough gases to take flame?
Shame.
I once walked into a grocery store rest room to find about a two-footer swirled in the pot like a length of brown garden hose. There was a twin in the next stall, too. I didn’t look in the third. I just don’t wanna know.
I once ate a dog’s liver or kidney pill, when I was about three. (I still remember it clearly - it looked like a blue M&M, so I picked it up and ate it. My mother went apeshit but apparently the vet and/or doctor was called and assured them it was non-fatal. Anyway, it turned my urine such a bright azure that my sisters were crowding in to see it. I remember that, too.
Ok, if we’re allowed to talk about urine, I squirted red for a couple of weeks when I was a 4yo back in the mid 1970s. Nothing bad came out of it, but it involved X-rays and needles, and to reward me for my courage my parents bought me a bunch of cool toys related to the greatest tv show in history Emergency - Wikipedia including a toy defibrillator, so PROFIT!
Was actually my first thought on reading the thread title.
Back when I was a little kid, say about 45 years ago, McDonalds used quite a different dye in their Shamrock Shakes. The very next day my poo was shamrock green. 
Sorry, apparently cutting and pasting the link for Winipedia’s page for the show Emergency! Just leads to the page for the word “emergency” for some reason. However, I’m sure that those of you who grew up in the 1970s know what I’m talking about.
I once heard of a ‘internal cleansing program’ which would produce black tar like ‘sticky as hell’ shit. While I didn’t do the cleanse, which involved some herbs and the like, There was that after effect connection, about a month or so later I had this really black and yes tar like shit, it took a very long time for it to be wiped, and a significant amount of tp. It was like trying to clean up tar, well tar may never come off, but it was pretty close.