I'll post here as you deactivated the comments in the project page ;)
I'm not certain we ruled everything as intended (we replaced the stuff card at the end of the turn it was gained, also the stuff cards which say not to add a stuff or to add more stuffs we played that you definitely play with one extra or one less card from when it was gained).
I translated the game and did some minimalistic colouring to easily sort the cat cards, here is how it looked on the table in case you're curious :