Seeing that, the baby yu will start saying "Not fair Mister Human got all the food", so give it to them with a warning that human food is poison to yukkuri.Mwunch-mwu...Those with a strong shithead tendency won't listen to what humans say, so they will consume a deadly amount of the spicy food and will die instantly.
If none survive, the process is over.To those not eliminated, give them cheap food. After that, show them chilli. If you don't have any, salt can also be used.