I have items stuck in the second page of my pet inventory, so I can't replace my pet to train another I have tried to purchase one for upwards of 500m. And now that they've removed the Pet Box from the store, you can't even BUY one, even though you'd literally be spending 15 bucks for it.
In the meantime, if you run out of pet cage time, you're just fucked? Like, I cannot remove my pet to train another.