Baby ferret aggression

Question
I'm a new ferret owner and recently got a baby ferret 6 days ago. Up until now he's been perfectly fine. He nibbled a little but that is to be expected. Today I played with him before I went to work. I came home 5 hours later and he was asleep. When he woke up on his own an hour later he was chewing on his fleece blanket so I gave him a crochet egg instead. A little time later I was changing his wet food and he hissed at me and jerked away. He kept on doing this so I scruffed him and hissed like the Ferrets for Dummies tells you to. I removed the fleece blanket because I don't want him to get a blockage and the crochet egg. Almost instantly he jumped onto the plastic rattle in his cage and keeps on biting it. I put some dry food in there (he prefers it to wet but it was irritating his anus to the point I thought he was bleeding so I removed it and his anus is better) in hopes of curbing this sudden biting behavior. He fell down from a height of 1 foot in his cage when exploring but he seemed fine. No limping, no cringing, nothing.

So here is my questions. I was wondering if this is normal? Maybe his teeth are bothering him like a teething toddler? If so would it be okay if I gave him some of the ferret chew treats? Also what would be a good cage liner since he is chewing the fleece blanket and the puppy pads? I don't want him to be cold. I'm really worried. I thought I was prepared when I read ferrets for dummies and two other books on ferrets but now I know better. I'm completely out of my element so any advice would be welcome. I don't want Emrys to be miserable or aggressive.

Thanks

Answer
It really depends on his age.  If he is pretty young, then it certainly could be teething that is causing the issue.  It is also likely that he is just a young ferret and like any young animal, they explore the world with their teeth.  I would make sure anything in his cage is "chew-proof".  Usually anything you can find for large parrots or dogs can be safe.  Since you have a chewer, make sure you supervise him closely.  Keep bedding out of his reach since he can get a blockage from ingesting it.  Make sure he has dry food and make sure he gets lots of play time outside of the cage as this type of behavior can also be due to lack of enrichment.