Yeah, post-shaving alopecia is a thing, especially in double coated breeds. (Which is part of the reason you’re supposed to avoid shaving them.)

Move over spherical cow, circular cat is my new best friend

My big thing is to avoid hard numbers wherever possible. EG, you’ve got a big spooky encounter with complicated abilities, passive/lair effects, etc etc; it’s health pool is whatever the plot demands. :P Realize you underestimated the raw dps of your players? Bump that health up until it has a chance to show off what it can do and feel like a threat. Realize this thing will just murder the hell out of them? Tune it down until they only need 1-2 good hits to bring it down before they’re out. Similar with saving throws, bonuses to hit, ac, etc. I usually don’t commit to anything until at least a round or two has passed. Much easier to balance the interplay of complicated features and abilities after you’ve seen what they can do, and there’s no reason you can’t do that on the fly, assuming your players trust you to want them to have the best experience possible.