Feeding cycles?

Hi mamas,

My baby is 16w2d old now. Since past couple days, he is very distracted and doesn’t want to feed at all. Initially he was diagnosed with jaundice and his weight dropped to 12 percentile. We’ve been feeding him on 3 hour cycles since then, and now he is back up to 42 percentile. Do you mamas feed your babies on cycle or on demand? I was thinking as he doesn’t want to feed I should start feeding him on demand and wait for him to ask for food. Hopefully it works. Just worried his weight might drop again 😬