Should I use Fleece or Kiln Dry Pine wood shavings for my Caviary ?

Well i heard about fleece in youtube videos and blogs . I currently own 15 breeding pairs + pregnant mothers, babies and so on, in total i own 50(+) guinea pigs. I currently use kiln dry pine wood shavings as bedding, and i want to use fleece but im not so sure. Should i go for it or should i keep my current bedding? please give your experiences with fleece or your opinions will be very help full!