My blood didnt poop for 6 months, and I put him in water just deep enough to force him to swim a little, I had to watch him very closely to make sure he did not drown, but he eventually started to try to poop, as he did so I very gently massaged his backside and 3 giant urates came out, and I mean GIANT...
1 week later he took a giant super dump, it was freakin huge, he literally dropped a turd that was more than 1/3 his body length it was ridiculous. I feel like the large hard urate stones were blocking him up, and the swim got those out along with the massage and this freed up his feces so he could have a bowel movement on his own.