I think you have to be riding the Phiomia in order to get the poop
Phiomia
While the Phiomia does not attack, many survivors see value in it as an easy-to-tame pack animal. It will quickly flee when attempting to knock it out, but once tranquilized, the Phiomia can be tamed very quickly, making it a popular choice for survivors looking for a creature to transport supplies. The Phiomia produces a lot of feces in comparison to other creatures, making it useful in fertilizer production.

More Phiomia Encountering Tips
These dudes hang out near the Beaches on herbivore island(Sometimes Mate boosted) so people can see ;)
This creature is passive, but when hit it will run, and it will be able to outrun you unless trapped. Make sure to have a bola handy if you want to tame!
First ever time I played ark, I chased one of these with my bare fists for 3 days (in ark). Got chased by pteranodons for thinking stealing their eggs was a good idea, got brutally beaten up by piranhas, chased by sarcos. Finally, after the poop machine ran into a rock, I…
First ever time I played ark, I chased one of these with my bare fists for 3 days (in ark). Got chased by pteranodons for thinking stealing their eggs was a good idea, got brutally beaten up by piranhas, chased by sarcos. Finally, after the poop machine ran into a rock, I knocked it out and tamed it. I then got a saddle and rode all the way across the map. We dodged every obstacle life faced together. Until a rex decided my purple guy (that’s what I named him) was a tasty snack, so I quit the game and started a new save. now I have a phioma eating rex- life’s weird….
Its easy if your lvl12 and got the bola just get it with the bola and nock it out and then give it berys
Tried to bola one and a trike came out of nowhere and killed me. If it touches my tames while I’m gone I will slaughter it with my bare hands
How many of us thought this was a pig? It's an elephant
I 100% guarantee you will find one getting chased in the swamps by a kapro, sarco or snake.
Sometimes i forget that these things exist
These things will drop lots of meat. the best way to kill them is to pick them up with your argentavis and kill them or to bola them and kill them
Its a very Good souce for poop
Helpful for planting, feed stimb. For poop overflow