Overcrowding

How does that work? Is it when I put too many wolves in one cave, or is it the number of pack members out of the limit? Are there problems if I have 8/8 members for example?

You can put as many wolves as you want in one cave, even all of your wolves if you want. There is no negative effect.

I'm not sure what you mean with "overcrowding" but I assume you are referring to having all of your adult slots full (like the 8/8 you said)

There are no problems per se with having all slots full, no negative moods or things like that, but if course you can't add more members to your pack (so you can't buy adults and/or befriend them in explore) until you have space for them.

Also, if you have adols that age up into adults, they will run away if there is no space and you will have to claim them back by paying some SC within a certain number of days (or they will be lost forever), of course after buying adult slots for them

I swear I saw someone with a "wolves may leave due to overcrowding" thing on their profile and thought it was some cave space mechanic. Holy shit, I'm stupid. It's for the aged up adolescents that one has no room for. Thank you!