I am unable to change the dye color on either of my pets (one wolf and one cat). All they do is sit/stand when I right-click them.

Another ticket was similar to this (MCPE-101082), but it was closed due to inaction by the poster. Plus, those symptoms were different than mine.

This WAS working fine in my last game, which was also at 1.21.3. So it's probably a broken or corrupt file, but I have no idea how to find the broken file.