My son did ask me later today if I could place the plastic tray back in...So...Instead of adding fleece...since you said one can leave the bedding in and they can still be litter trained...I added the bedding. And when he jumps around on the tray...it's quiet again...Thanks Jo Ann...
And it hides the poo...I was vacuuming it daily...sometimes twice a day...
or to be honest...the other day...three times. So I didn't see the poo in the cage. Now with the bedding again...it sort of falls to the bottom a bit...sometimes not...but you don't see nearly the poo with the bedding in there. Now to see if he kicks it out of the cage...The deeper tray will hopefully keep it inside the cage better.