I think because they believe the obstruction was mechanical, possibly brought on by scar tissue and adhesions and that it just suddenly happened... One day it wasn't there, next day it was.. that they want us to continue on as we did before, but to play around with the enzymes -- increase the number. And to monitor his progress -- output. They discussed percentages of this ever happening to someone and think they said 1%.
I have noticed he's had more normal colored poop -- brown and not the greenish/green flecks.
In any event, he's apparently decided to be a mystery to everyone -- had his own time frame for recovery and a very round about way (rocky) in reaching that goal. Needless to say we'll be a bit gunshy for awhile.