I used it for my pet Jigsaw and I have a 2nd berry (says pets already eaten) so i know i've done it before. Hungers never satisfied

According to Subetalodge: Notes: Nothing will happen to your pet if you feed them this berry (other than getting fully fed). The reference to mutation in the text is a joke. Your pet will also continue to get hungry after you've fed it. The infinity part is that the berry does not get used up, it will remain in your inventory after feeding.

Thank you so much! That's even better. Happy lumi <3

Locking this up since it's not a bug. :)