Ok so i was trying to do a dungeon and i went to drop pods for ancient amber

In the purple drop pod THERE WAS A UNICORN NEARIT so i requested my argy and brought the uni into the pen and i got rockarots asap and when i tried to feed it it still said "need taming food to tame" like wdym? I have rockarots well i just looked at the info page and then went to the tips and realized u need a griffin kibble😔