Not sure if this has been mentioned but, use plant y traps to tame. They are no cost a few hundred should tame a level 100. You will need to bring extra since I have not gotten exact numbers on how many are needed.
Baby gacha will gain food any time any babies around them gain food, so raising them next to other babies until they can get on trough is an easy method of keeping their hunger up. Just don't leave render, as it prevents this method from working.