With Taylor, after 4 months, firm poops have been a rarity.
Sometimes they are firm first thing in the morning, sometimes at night.
There seems to be no rhyme or reason. That's with a couple of changes of food, too, with plenty of time to get used to it.
VERY rarely has he ever had a "normal" poop. They are somewhat formed, but not firm.
Luckily, I have a yard he poops in, and I pickup what I can with a bag, and just hit the rest with a hose.