Thank you for the feedback!
I found out that the “Please do not the cat” meme is mostly unknown outside of the funny cat pics groups (some of them are even named after this meme), sorry. This is supposed to be the original: https://www.facebook.com/1678037035790524/posts/please-do-not-the-cat/2342600266000861/ (other posts on the page might be NSFW)
As for the confusing thing: [SPOILERS AHEAD] That’s not supposed to happen. You should be able to give the cat the tuna, retaining the chicken in the inventory, so you can later try to give the chicken too (and the other way round). Gonna look into this, thanks for pointing it out!