I don't know if this is a serious problem & I forgot to ask the vet when I was there this past Saturday, but Levi has taken to eating the cardboard box from around their turbo scratcher. At first he would just chew on it & spit the pieces out (not a lot of fun to clean but not really anything to worry about). However, the other night I noticed he was eating some of the pieces. I tried to stop him, but he kept going back. He is fed Royal Canin & my vet told at their visit I was feeding the boys too much (a cup a day for 8 lb cats), so I had to cut back, but he was doing this last week before I cut back their food. I have two questions, why would he be doing this? and Is there any health risk to this? (He's 7 months if that makes a difference)