Specifically about pet slots. Sorry if this is in the wrong forum!

If you redeem the pet slot totem, you get one pet slot. I'm not sure what else you need to know? The descriptions of each totem explain what they do. You can read those on the hovers if you select to open your box, but they're also all here

There used to be a bug about where if you didnt have all your current slots filled, or something you'd lose it? IDK, I was always to afraid to test it!

GAs used to give 5 pet slots. So if you had filled those 5 slots and no longer had a GA, you wouldn't be able to fill them until you activated the GA again. So if you had 30 pets and your GA ran out, you would have 25 slots. You could get a new pet slot but you wouldn't be able to use it until you either bought enough slots to cover those 5 extra pets +1 or activated another GA.

But pet slots no longer have anything to do with GAs so that's all irrelevant, you're free to use your pet slots whenever c: