I think being that he was off feed for so long it is not necessary to worry just yet. It's only been a little over a month since he's started eating again. You can try soaking, some like to poo in water and it could help loosen things up. From what I've heard this is a common "issue" with ball pythons, mine all eat, poo, and pee normally so luckily I haven't had to worry, but I think even after a month I wouldn't start to worry. I'd say after about 3 months I'd start thinking about alternative "help". Good luck