Our cats (or the cats that we belong to, you can never tell) are not subject to any lock down as far as I'm aware but from time the do exhibit some signs of cabin fever. Can't blame the weather either but it may be something we're doing or even not doing. So they seem to celebrate their frustration by participating in the ancient martial art of ineffective indoor feline kung-fu. The worst possible injury being a mouth full of fluff. Nobody enjoys suffering from that.
Here's the shorter version, or the highlights even.