I am late to the game here. However, I have a a 4 year old male corn, 550G.

When I first got him, at 9G, I didn't have temps correct, and he regurgitated a few meals.

I figured out the temps and he's been a great eater, and digester, every since.

What are your temps?

Corns are pretty happy with a 84-87 degree hot spot and a 72-75 degree cool spot, in my experience. Too hot is not good. Too cold is also not good.

There should be a gradient.

Everything else talked about here makes sense.

I am just adding my two cents from personal experience. I was worried sick when I first got him, but it was purely a husbandry issue. Not saying that is the case, but it's possible.