Hi flowerfairy, thanks for the info. Is it dusty? When our hams chomp up lots of cardboard (tissue boxes, box packaging like Amazon boxes) that's in their cage either for hidey places, tunnels, or as dividers etc. I find the bits quite dusty & it can trigger my asthma.
I'm guessing this is cos the cardboard isn't designed as bedding whereas finacard is. If it's stronger than fitch & not as dusty as bog-standard cardboard (boom boom) I might give it a go under the fitch like you do.