The snake was dehydrated lol. It doesnt take a rocket scientist to figure that out. If he has been constipated multiple times now, you need to figure out your husbandry. None of my snakes have ever been constipated since i have had them in over 5 years. Even my old BP which i had for 10 years never got constipated.
Not sure why the vet wouldnt talk to you about it. My vet takes note on everything when i bring a new snake to her. It's like 100 questions about husbandry, feeding, temps, history, everything. But my vet is pretty awesome. She saved Allies life when Allie accidently ingested some Provent-A-Mite. She did try and bite the vet a few times when she felt better lol. The vet called me and told me i think Allie is ready to go home now as she took a couple shots at me lol.
Anyways, like i said, constipation is from humidity issues or the snake ate something that was entirely too big and couldnt be digested like a bunch of paper towels, wash cloth or something else like that. A few pieces of coco husk or a pinch of ground up coco husk would not create that kind of blockage.
Also good that the vet got the poop out. I bet it was like uncorking a bottle of shaken champagne lol.