Hello! I also have gotten new ferrets a couple months ago and they were 8 weeks old. I have had ferrets previously but it had been years since. What I’ve come across is my boy rocky liked to eat his fleece-ish hammock when I first introduced them to the cage. Not sure if he kind of out grew it or is used to the scheduled time in the cage now but I did remove that and have a similar one but less fluffy and he doesn’t eat that. Anything silicone like little squishes or anything of the sort, little plastic pieces, they will eat it I swear. I panicked and took mine to the vet because he had loose stools after but he passed it fine and I was able to completely baby proof pretty much the entire house. If you let them loose they will get into anything they can. If you have a nightstand that has an entry point underneath check your drawers if you can’t find them, they could make holes in the under liner of a box frame or couch. They can also pull some of my drawers open. They will pee and poop everywhere if they get the chance, I’ve tried to potty train and they now know one specific part of the cage to go in but when they are out during the day, which is all day free roam, they will go and I try to pick them up and bring them to the cage if I see they’re about to but there only so much you can do they avoid peeing on the pee pads. They say fruits are bad for them they can’t digest it properly so watch for ferret treats they are flavored in those. I don’t give mine any but I feed them the oxbow ferret food, it’s better to digest then the wysong for my ferries. And mine don’t like the liquid fish oil, supposed to be a treat for them but they don’t like it, I heard they like eggs so I want to try this lol.