I have about 10 double chests of rotten flesh (my zombie pigman farm is working nicely thank you very much).
While rotten flesh is great for dogs, I just can't imagine using any more than a hand full of stacks for them.
I have also been using it for some decay timers. But that uses 1 every 5 minutes. So, in about a third of a year I'll have used it up....
Does Rotten Flesh have any other uses?